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1. Quantitative MR Image Reconstruction using Parameter-Specific Dictionary Learning with Adaptive Dictionary-Size and Sparsity-Level Choice

Author

Kofler, Andreas, Kerkering, Kirsten Miriam, Göschel, Laura, Fillmer, Ariane, and Kolbitsch, Cristoph

Subjects
Electrical Engineering and Systems Science - Image and Video Processing, Electrical Engineering and Systems Science - Signal Processing, Physics - Medical Physics
Abstract

Objective: We propose a method for the reconstruction of parameter-maps in Quantitative Magnetic Resonance Imaging (QMRI). Methods: Because different quantitative parameter-maps differ from each other in terms of local features, we propose a method where the employed dictionary learning (DL) and sparse coding (SC) algorithms automatically estimate the optimal dictionary-size and sparsity level separately for each parameter-map. We evaluated the method on a $T_1$-mapping QMRI problem in the brain using the BrainWeb data as well as in-vivo brain images acquired on an ultra-high field 7T scanner. We compared it to a model-based acceleration for parameter mapping (MAP) approach, other sparsity-based methods using total variation (TV), Wavelets (Wl) and Shearlets (Sh), and to a method which uses DL and SC to reconstruct qualitative images, followed by a non-linear (DL+Fit). Results: Our algorithm surpasses MAP, TV, Wl and Sh in terms of RMSE and PSNR. It yields better or comparable results to DL+Fit by additionally significantly accelerating the reconstruction by a factor of approximately seven. Conclusion: The proposed method outperforms the reported methods of comparison and yields accurate $T_1$-maps. Although presented for $T_1$-mapping in the brain, our method's structure is general and thus most probably also applicable for the the reconstruction of other quantitative parameters in other organs. Significance: From a clinical perspective, the obtained $T_1$-maps could be utilized to differentiate between healthy subjects and patients with Alzheimer's disease. From a technical perspective, the proposed unsupervised method could be employed to obtain ground-truth data for the development of data-driven methods based on supervised learning.+, Comment: Accepted for publication in IEEE Transactions on Biomedical Engineering, see https://ieeexplore.ieee.org/document/10209588

Published
2023
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2. Frequency drift in MR spectroscopy at 3T.

Author

Hui, Steve CN, Mikkelsen, Mark, Zöllner, Helge J, Ahluwalia, Vishwadeep, Alcauter, Sarael, Baltusis, Laima, Barany, Deborah A, Barlow, Laura R, Becker, Robert, Berman, Jeffrey I, Berrington, Adam, Bhattacharyya, Pallab K, Blicher, Jakob Udby, Bogner, Wolfgang, Brown, Mark S, Calhoun, Vince D, Castillo, Ryan, Cecil, Kim M, Choi, Yeo Bi, Chu, Winnie CW, Clarke, William T, Craven, Alexander R, Cuypers, Koen, Dacko, Michael, de la Fuente-Sandoval, Camilo, Desmond, Patricia, Domagalik, Aleksandra, Dumont, Julien, Duncan, Niall W, Dydak, Ulrike, Dyke, Katherine, Edmondson, David A, Ende, Gabriele, Ersland, Lars, Evans, C John, Fermin, Alan SR, Ferretti, Antonio, Fillmer, Ariane, Gong, Tao, Greenhouse, Ian, Grist, James T, Gu, Meng, Harris, Ashley D, Hat, Katarzyna, Heba, Stefanie, Heckova, Eva, Hegarty, John P, Heise, Kirstin-Friederike, Honda, Shiori, Jacobson, Aaron, Jansen, Jacobus FA, Jenkins, Christopher W, Johnston, Stephen J, Juchem, Christoph, Kangarlu, Alayar, Kerr, Adam B, Landheer, Karl, Lange, Thomas, Lee, Phil, Levendovszky, Swati Rane, Limperopoulos, Catherine, Liu, Feng, Lloyd, William, Lythgoe, David J, Machizawa, Maro G, MacMillan, Erin L, Maddock, Richard J, Manzhurtsev, Andrei V, Martinez-Gudino, María L, Miller, Jack J, Mirzakhanian, Heline, Moreno-Ortega, Marta, Mullins, Paul G, Nakajima, Shinichiro, Near, Jamie, Noeske, Ralph, Nordhøy, Wibeke, Oeltzschner, Georg, Osorio-Duran, Raul, Otaduy, Maria CG, Pasaye, Erick H, Peeters, Ronald, Peltier, Scott J, Pilatus, Ulrich, Polomac, Nenad, Porges, Eric C, Pradhan, Subechhya, Prisciandaro, James Joseph, Puts, Nicolaas A, Rae, Caroline D, Reyes-Madrigal, Francisco, Roberts, Timothy PL, Robertson, Caroline E, Rosenberg, Jens T, Rotaru, Diana-Georgiana, O'Gorman Tuura, Ruth L, Saleh, Muhammad G, Sandberg, Kristian, Sangill, Ryan, and Schembri, Keith

Subjects
3T, Frequency drift, Magnetic resonance spectroscopy, Multi-site, Multi-vendor, Press, Brain, Data Analysis, Databases, Factual, Humans, Magnetic Resonance Imaging, Magnetic Resonance Spectroscopy, Clinical Research, Biomedical Imaging, Neurology & Neurosurgery, Medical and Health Sciences, Psychology and Cognitive Sciences
Abstract

PurposeHeating of gradient coils and passive shim components is a common cause of instability in the B0 field, especially when gradient intensive sequences are used. The aim of the study was to set a benchmark for typical drift encountered during MR spectroscopy (MRS) to assess the need for real-time field-frequency locking on MRI scanners by comparing field drift data from a large number of sites.MethodA standardized protocol was developed for 80 participating sites using 99 3T MR scanners from 3 major vendors. Phantom water signals were acquired before and after an EPI sequence. The protocol consisted of: minimal preparatory imaging; a short pre-fMRI PRESS; a ten-minute fMRI acquisition; and a long post-fMRI PRESS acquisition. Both pre- and post-fMRI PRESS were non-water suppressed. Real-time frequency stabilization/adjustment was switched off when appropriate. Sixty scanners repeated the protocol for a second dataset. In addition, a three-hour post-fMRI MRS acquisition was performed at one site to observe change of gradient temperature and drift rate. Spectral analysis was performed using MATLAB. Frequency drift in pre-fMRI PRESS data were compared with the first 5:20 minutes and the full 30:00 minutes of data after fMRI. Median (interquartile range) drifts were measured and showed in violin plot. Paired t-tests were performed to compare frequency drift pre- and post-fMRI. A simulated in vivo spectrum was generated using FID-A to visualize the effect of the observed frequency drifts. The simulated spectrum was convolved with the frequency trace for the most extreme cases. Impacts of frequency drifts on NAA and GABA were also simulated as a function of linear drift. Data from the repeated protocol were compared with the corresponding first dataset using Pearson's and intraclass correlation coefficients (ICC).ResultsOf the data collected from 99 scanners, 4 were excluded due to various reasons. Thus, data from 95 scanners were ultimately analyzed. For the first 5:20 min (64 transients), median (interquartile range) drift was 0.44 (1.29) Hz before fMRI and 0.83 (1.29) Hz after. This increased to 3.15 (4.02) Hz for the full 30 min (360 transients) run. Average drift rates were 0.29 Hz/min before fMRI and 0.43 Hz/min after. Paired t-tests indicated that drift increased after fMRI, as expected (p < 0.05). Simulated spectra convolved with the frequency drift showed that the intensity of the NAA singlet was reduced by up to 26%, 44 % and 18% for GE, Philips and Siemens scanners after fMRI, respectively. ICCs indicated good agreement between datasets acquired on separate days. The single site long acquisition showed drift rate was reduced to 0.03 Hz/min approximately three hours after fMRI.DiscussionThis study analyzed frequency drift data from 95 3T MRI scanners. Median levels of drift were relatively low (5-min average under 1 Hz), but the most extreme cases suffered from higher levels of drift. The extent of drift varied across scanners which both linear and nonlinear drifts were observed.

Published
2021

4. Frequency drift in MR spectroscopy at 3T

Author

Hui, Steve C.N., Mikkelsen, Mark, Zöllner, Helge J., Ahluwalia, Vishwadeep, Alcauter, Sarael, Baltusis, Laima, Barany, Deborah A., Barlow, Laura R., Becker, Robert, Berman, Jeffrey I., Berrington, Adam, Bhattacharyya, Pallab K., Blicher, Jakob Udby, Bogner, Wolfgang, Brown, Mark S., Calhoun, Vince D., Castillo, Ryan, Cecil, Kim M., Choi, Yeo Bi, Chu, Winnie C.W., Clarke, William T., Craven, Alexander R., Cuypers, Koen, Dacko, Michael, de la Fuente-Sandoval, Camilo, Desmond, Patricia, Domagalik, Aleksandra, Dumont, Julien, Duncan, Niall W., Dydak, Ulrike, Dyke, Katherine, Edmondson, David A., Ende, Gabriele, Ersland, Lars, Evans, C. John, Fermin, Alan S.R., Ferretti, Antonio, Fillmer, Ariane, Gong, Tao, Greenhouse, Ian, Grist, James T., Gu, Meng, Harris, Ashley D., Hat, Katarzyna, Heba, Stefanie, Heckova, Eva, Hegarty, John P., II, Heise, Kirstin-Friederike, Honda, Shiori, Jacobson, Aaron, Jansen, Jacobus F.A., Jenkins, Christopher W., Johnston, Stephen J., Juchem, Christoph, Kangarlu, Alayar, Kerr, Adam B., Landheer, Karl, Lange, Thomas, Lee, Phil, Levendovszky, Swati Rane, Limperopoulos, Catherine, Liu, Feng, Lloyd, William, Lythgoe, David J., Machizawa, Maro G., MacMillan, Erin L., Maddock, Richard J., Manzhurtsev, Andrei V., Martinez-Gudino, María L., Miller, Jack J., Mirzakhanian, Heline, Moreno-Ortega, Marta, Mullins, Paul G., Nakajima, Shinichiro, Near, Jamie, Noeske, Ralph, Nordhøy, Wibeke, Oeltzschner, Georg, Osorio-Duran, Raul, Otaduy, Maria C.G., Pasaye, Erick H., Peeters, Ronald, Peltier, Scott J., Pilatus, Ulrich, Polomac, Nenad, Porges, Eric C., Pradhan, Subechhya, Prisciandaro, James Joseph, Puts, Nicolaas A, Rae, Caroline D., Reyes-Madrigal, Francisco, Roberts, Timothy P.L., Robertson, Caroline E., Rosenberg, Jens T., Rotaru, Diana-Georgiana, O'Gorman Tuura, Ruth L, Saleh, Muhammad G., Sandberg, Kristian, Sangill, Ryan, Schembri, Keith, Schrantee, Anouk, Semenova, Natalia A., Singel, Debra, Sitnikov, Rouslan, Smith, Jolinda, Song, Yulu, Stark, Craig, Stoffers, Diederick, Swinnen, Stephan P., Tain, Rongwen, Tanase, Costin, Tapper, Sofie, Tegenthoff, Martin, Thiel, Thomas, Thioux, Marc, Truong, Peter, van Dijk, Pim, Vella, Nolan, Vidyasagar, Rishma, Vovk, Andrej, Wang, Guangbin, Westlye, Lars T., Wilbur, Timothy K., Willoughby, William R., Wilson, Martin, Wittsack, Hans-Jörg, Woods, Adam J., Wu, Yen-Chien, Xu, Junqian, Lopez, Maria Yanez, Yeung, David K.W., Zhao, Qun, Zhou, Xiaopeng, Zupan, Gasper, and Edden, Richard A.E.

Published
2021
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5. European Ultrahigh-Field Imaging Network for Neurodegenerative Diseases (EUFIND)

Author

Düzel, Emrah, Acosta-Cabronero, Julio, Berron, David, Biessels, Geert Jan, Björkman-Burtscher, Isabella, Bottlaender, Michel, Bowtell, Richard, Buchem, Mark v, Cardenas-Blanco, Arturo, Boumezbeur, Fawzi, Chan, Dennis, Clare, Stuart, Costagli, Mauro, de Rochefort, Ludovic, Fillmer, Ariane, Gowland, Penny, Hansson, Oskar, Hendrikse, Jeroen, Kraff, Oliver, Ladd, Mark E., Ronen, Itamar, Petersen, Esben, Rowe, James B., Siebner, Hartwig, Stoecker, Tony, Straub, Sina, Tosetti, Michela, Uludag, Kamil, Vignaud, Alexandre, Zwanenburg, Jaco, and Speck, Oliver

Published
2019
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6. NMR and dielectric studies of hydrated collagen and elastin: Evidence for a delocalized secondary relaxation

Author

Lusceac, Sorin A., Rosenstihl, Markus, Vogel, Michael, Gainaru, Catalin, Fillmer, Ariane, and Böhmer, Roland

Subjects
Condensed Matter - Soft Condensed Matter
Abstract

Using a combination of dielectric spectroscopy and solid-state deuteron NMR, the hydration water dynamics of connective tissue proteins is studied at sub-ambient temperatures. In this range, the water dynamics follows an Arrhenius law. A scaling analysis of dielectric losses, 'two-phase' NMR spectra, and spin-lattice relaxation times consistently yield evidence for a Gaussian distribution of energy barriers. With the dielectric data as input, random-walk simulations of a large-angle, quasi-isotropic water reorientation provide an approximate description of stimulated-echo data on hydrated elastin. This secondary process takes place in an essentially rigid energy landscape, but in contrast to typical {\beta}-relaxations it is quasi-isotropic and delocalized. The delocalization is inferred from previous NMR diffusometry experiments. To emphasize the distinction from conventional {\beta}-processes, for aqueous systems such a matrix-decoupled relaxation was termed a {\nu}-process. It is emphasized that the phenomenology of this time-honored, 'new' process is shared by many non-aqueous binary glasses in which the constituent components exhibit a sufficient dynamical contrast.

Published
2010
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7. Quantitative MR Image Reconstruction Using Parameter-Specific Dictionary Learning With Adaptive Dictionary-Size and Sparsity-Level Choice

Author

Kofler, Andreas, Kerkering, Kirsten Miriam, Goschel, Laura, Fillmer, Ariane, and Kolbitsch, Christoph

Abstract

Objective: We propose a method for the reconstruction of parameter-maps in Quantitative Magnetic Resonance Imaging (QMRI). Methods: Because different quantitative parameter-maps differ from each other in terms of local features, we propose a method where the employed dictionary learning (DL) and sparse coding (SC) algorithms automatically estimate the optimal dictionary-size and sparsity level separately for each parameter-map. We evaluated the method on a $T_{1}$-mapping QMRI problem in the brain using the BrainWeb data as well as in-vivo brain images acquired on an ultra-high field 7 T scanner. We compared it to a model-based acceleration for parameter mapping (MAP) approach, other sparsity-based methods using total variation (TV), Wavelets (Wl), and Shearlets (Sh) to a method which uses DL and SC to reconstruct qualitative images, followed by a non-linear (DL+Fit). Results: Our algorithm surpasses MAP, TV, Wl, and Sh in terms of RMSE and PSNR. It yields better or comparable results to DL+Fit by additionally significantly accelerating the reconstruction by a factor of approximately seven. Conclusion: The proposed method outperforms the reported methods of comparison and yields accurate $T_{1}$-maps. Although presented for $T_{1}$-mapping in the brain, our method's structure is general and thus most probably also applicable for the the reconstruction of other quantitative parameters in other organs. Significance: From a clinical perspective, the obtained $T_{1}$-maps could be utilized to differentiate between healthy subjects and patients with Alzheimer's disease. From a technical perspective, the proposed unsupervised method could be employed to obtain ground-truth data for the development of data-driven methods based on supervised learning.

Published
2024
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9. Pentafluorosulfanyl (SF(5)) as a superior (19)F magnetic resonance reporter group: signal detection and biological activity of teriflunomide derivatives

Author

Prinz, Christian, Starke, Ludger, Ramspoth, Tizian-Frank, Kerkering, Janis, Martos Riaño, Vera, Paul, Jérôme, Neuenschwander, Martin, Oder, Andreas, Radetzki, Silke, Adelhoefer, Siegfried, Ramos Delgado, Paula, Aravina, Mariya, Millward, Jason M., Fillmer, Ariane, Paul, Friedemann, Siffrin, Volker, von Kries, Jens-Peter, Niendorf, Thoralf, Nazaré, Marc, and Waiczies, Sonia

Subjects
MRS, Magnetic Resonance Spectroscopy, Toluidines, Dihydroorotate Dehydrogenase, DHODH, Hydroxybutyrates, Magnetic Resonance Imaging, Article, Cardiovascular and Metabolic Diseases, fluorine, Crotonates, Nitriles, teriflunomide, Animals, Technology Platforms, Function and Dysfunction of the Nervous System, SF5, MRI
Abstract

Fluorine ((19)F) magnetic resonance imaging (MRI) is severely limited by a low signal-to noise ratio (SNR), and tapping it for (19)F drug detection in vivo still poses a significant challenge. However, it bears the potential for label-free theranostic imaging. Recently, we detected the fluorinated dihydroorotate dehydrogenase (DHODH) inhibitor teriflunomide (TF) noninvasively in an animal model of multiple sclerosis (MS) using (19)F MR spectroscopy (MRS). In the present study, we probed distinct modifications to the CF(3) group of TF to improve its SNR. This revealed SF(5) as a superior alternative to the CF(3) group. The value of the SF(5) bioisostere as a (19)F MRI reporter group within a biological or pharmacological context is by far underexplored. Here, we compared the biological and pharmacological activities of different TF derivatives and their (19)F MR properties (chemical shift and relaxation times). The (19)F MR SNR efficiency of three MRI methods revealed that SF(5)-substituted TF has the highest (19)F MR SNR efficiency in combination with an ultrashort echo-time (UTE) MRI method. Chemical modifications did not reduce pharmacological or biological activity as shown in the in vitro dihydroorotate dehydrogenase enzyme and T cell proliferation assays. Instead, SF(5)-substituted TF showed an improved capacity to inhibit T cell proliferation, indicating better anti-inflammatory activity and its suitability as a viable bioisostere in this context. This study proposes SF(5) as a novel superior (19)F MR reporter group for the MS drug teriflunomide.

Published
2021

10. Advanced single voxel 1H magnetic resonance spectroscopy techniques in humans: Experts' consensus recommendations

Author

Öz, Gülin, Deelchand, Dinesh K., Wijnen, Jannie P., Mlynárik, Vladimír, Xin, Lijing, Mekle, Ralf, Noeske, Ralph, Scheenen, Tom W.J., Tkáč, Ivan, Andronesi, Ovidiu, Barker, Peter B., Bartha, Robert, Berrington, Adam, Boer, Vincent, Cudalbu, Christina, Emir, Uzay E., Ernst, Thomas, Fillmer, Ariane, Heerschap, Arend, Henry, Pierre Gilles, Hurd, Ralph E., Joers, James M., Juchem, Christoph, Kan, Hermien E., Klomp, Dennis W.J., Kreis, Roland, Landheer, Karl, Mangia, Silvia, Marjańska, Małgorzata, Near, Jamie, Ratai, Eva M., and Ronen, Itamar

Subjects
Scanner, Computer science, Single voxel, brain, computer.software_genre, B1 field, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, chemical shift displacement, 0302 clinical medicine, Voxel, SPECIAL, shimming, Radiology, Nuclear Medicine and imaging, reproducibility, Spectroscopy, metabolites, Shift displacement, business.industry, Shim (magnetism), Pattern recognition, semiadiabatic LASER, body, Molecular Medicine, Artificial intelligence, business, Proton mrs, Quality assurance, computer, 030217 neurology & neurosurgery
Abstract

Conventional proton MRS has been successfully utilized to noninvasively assess tissue biochemistry in conditions that result in large changes in metabolite levels. For more challenging applications, namely, in conditions which result in subtle metabolite changes, the limitations of vendor-provided MRS protocols are increasingly recognized, especially when used at high fields (≥3 T) where chemical shift displacement errors, B0 and B1 inhomogeneities and limitations in the transmit B1 field become prominent. To overcome the limitations of conventional MRS protocols at 3 and 7 T, the use of advanced MRS methodology, including pulse sequences and adjustment procedures, is recommended. Specifically, the semiadiabatic LASER sequence is recommended when TE values of 25-30 ms are acceptable, and the semiadiabatic SPECIAL sequence is suggested as an alternative when shorter TE values are critical. The magnetic field B0 homogeneity should be optimized and RF pulses should be calibrated for each voxel. Unsuppressed water signal should be acquired for eddy current correction and preferably also for metabolite quantification. Metabolite and water data should be saved in single shots to facilitate phase and frequency alignment and to exclude motion-corrupted shots. Final averaged spectra should be evaluated for SNR, linewidth, water suppression efficiency and the presence of unwanted coherences. Spectra that do not fit predefined quality criteria should be excluded from further analysis. Commercially available tools to acquire all data in consistent anatomical locations are recommended for voxel prescriptions, in particular in longitudinal studies. To enable the larger MRS community to take advantage of these advanced methods, a list of resources for these advanced protocols on the major clinical platforms is provided. Finally, a set of recommendations are provided for vendors to enable development of advanced MRS on standard platforms, including implementation of advanced localization sequences, tools for quality assurance on the scanner, and tools for prospective volume tracking and dynamic linear shim corrections.

Published
2021

11. Reward Versus Nonreward Sensitivity of the Medial Versus Lateral Orbitofrontal Cortex Relates to the Severity of Depressive Symptoms

Author

Xie, Chao, Jia, Tianye, Rolls, Edmund T., Robbins, Trevor W., Sahakian, Barbara J., Zhang, Jie, Liu, Zhaowen, Cheng, Wei, Luo, Qiang, Zac Lo, Chun-Yi, Wang, He, Banaschewski, Tobias, Barker, Gareth J., Bokde, Arun L.W., Quinlan, Erin Burke, Flor, Herta, Grigis, Antoine, Garavan, Hugh, Gowland, Penny, Heinz, Andreas, Hohmann, Sarah, Ittermann, Bernd, Martinot, Jean-Luc, Nees, Frauke, Orfanos, Dimitri Papadopoulos, Poustka, Luise, Smolka, Michael N., Walter, Henrik, Whelan, Robert, Schumann, Gunter, Feng, Jianfeng, Artiges, Eric, Aydin, Semiha, Barbot, Alexis, Barker, Gareth, Becker, Andreas, Bezivin-Frere, Pauline, Biondo, Francesca, Bokde, Arun, Chu, Congying, Conrod, Patricia, Daedelow, Laura, Dalley, Jeffrey, Desrivieres, Sylvane, Dooley, Eoin, Filippi, Irina, Fillmer, Ariane, Frouin, Vincent, Grimmer, Yvonne, Ihlenfeld, Albrecht, Ing, Alex, Isensee, Corinna, Lethbridge, Emma, Millenet, Sabina, Miller, Sarah, Miranda, Ruben, Paillere, Marie-Laure, Papadopoulos, Dimitri, Pausova, Zdenka, Pentilla, Jani, Poline, Jean-Baptiste, Burke, Erin, Rapp, Michael, Robbins, Trevor, Robert, Gabriel, Rogers, John, Ruggeri, Barbara, Smolka, Michael, Stringaris, Argyris, van Noort, Betteke, Simon, Roux, Williams, Steve, and Zhang, Yuning

Subjects
nervous system, Radiology Nuclear Medicine and imaging, musculoskeletal, neural, and ocular physiology, Cognitive Neuroscience, Clinical Neurology, psychological phenomena and processes, Biological Psychiatry
Abstract

BackgroundThe orbitofrontal cortex (OFC) is implicated in depression. The hypothesis investigated was whether the OFC sensitivity to reward and nonreward is related to the severity of depressive symptoms.MethodsActivations in the monetary incentive delay task were measured in the IMAGEN cohort at ages 14 years (n = 1877) and 19 years (n = 1140) with a longitudinal design. Clinically relevant subgroups were compared at ages 19 (high-severity group: n = 116; low-severity group: n = 206) and 14.ResultsThe medial OFC exhibited graded activation increases to reward, and the lateral OFC had graded activation increases to nonreward. In this general population, the medial and lateral OFC activations were associated with concurrent depressive symptoms at both ages 14 and 19 years. In a stratified high-severity depressive symptom group versus control group comparison, the lateral OFC showed greater sensitivity for the magnitudes of activations related to nonreward in the high-severity group at age 19 (p = .027), and the medial OFC showed decreased sensitivity to the reward magnitudes in the high-severity group at both ages 14 (p = .002) and 19 (p = .002). In a longitudinal design, there was greater sensitivity to nonreward of the lateral OFC at age 14 for those who exhibited high depressive symptom severity later at age 19 (p = .003).ConclusionsActivations in the lateral OFC relate to sensitivity to not winning, were associated with high depressive symptom scores, and at age 14 predicted the depressive symptoms at ages 16 and 19. Activations in the medial OFC were related to sensitivity to winning, and reduced reward sensitivity was associated with concurrent high depressive symptom scores.

Published
2021

12. In vivo detection of teriflunomide-derived fluorine signal during neuroinflammation using fluorine MR spectroscopy

Author

Prinz, Christian, Starke, Ludger, Millward, Jason M., Fillmer, Ariane, Delgado, Paula Ramos, Waiczies, Helmar, Pohlmann, Andreas, Rothe, Michael, Nazaré, Marc, Paul, Friedemann, Niendorf, Thoralf, and Waiczies, Sonia

Subjects
MRS, Magnetic Resonance Spectroscopy, Multiple Sclerosis, Cardiovascular and Metabolic Diseases, Teriflunomide, experimental autoimmune encephalomyelitis, Fluorine, Technology Platforms, Function and Dysfunction of the Nervous System, Research Paper, MRI
Abstract

BACKGROUND: Magnetic resonance imaging (MRI) is indispensable for diagnosing neurological conditions such as multiple sclerosis (MS). MRI also supports decisions regarding the choice of disease-modifying drugs (DMDs). Determining in vivo tissue concentrations of DMDs has the potential to become an essential clinical tool for therapeutic drug monitoring (TDM). The aim here was to examine the feasibility of fluorine-19 ((19)F) MR methods to detect the fluorinated DMD teriflunomide (TF) during normal and pathological conditions. METHODS: We used (19)F MR spectroscopy to detect TF in the experimental autoimmune encephalomyelitis (EAE) mouse model of multiple sclerosis (MS) in vivo. Prior to the in vivo investigations we characterized the MR properties of TF in vitro. We studied the impact of pH and protein binding as well as MR contrast agents. RESULTS: We could detect TF in vivo and could follow the (19)F MR signal over different time points of disease. We quantified TF concentrations in different tissues using HPLC/MS and showed a significant correlation between ex vivo TF levels in serum and the ex vivo (19)F MR signal. CONCLUSION: This study demonstrates the feasibility of (19)F MR methods to detect TF during neuroinflammation in vivo. It also highlights the need for further technological developments in this field. The ultimate goal is to add (19)F MR protocols to conventional (1)H MRI protocols in clinical practice to guide therapy decisions.

Published
2021

13. Frequency Drift in MR Spectroscopy at 3T

Author

Hui, Steve C N, Mikkelsen, Mark, Zöllner, Helge J, Ahluwalia, Vishwadeep, Alcauter, Sarael, Baltusis, Laima, Barany, Deborah A, Barlow, Laura R, Becker, Robert, Berman, Jeffrey I, Berrington, Adam, Bhattacharyya, Pallab K, Blicher, Jakob Udby, Bogner, Wolfgang, Brown, Mark S, Calhoun, Vince D, Castillo, Ryan, Cecil, Kim M, Choi, Yeo Bi, Chu, Winnie C W, Clarke, William T, Craven, Alexander R, Cuypers, Koen, Dacko, Michael, de la Fuente-Sandoval, Camilo, Desmond, Patricia, Domagalik, Aleksandra, Dumont, Julien, Duncan, Niall W, Dydak, Ulrike, Dyke, Katherine, Edmondson, David A, Ende, Gabriele, Ersland, Lars, Evans, C John, Fermin, Alan S R, Ferretti, Antonio, Fillmer, Ariane, Gong, Tao, Greenhouse, Ian, Grist, James T, Gu, Meng, Harris, Ashley D, Hat, Katarzyna, Heba, Stefanie, Heckova, Eva, Hegarty, John P, Heise, Kirstin-Friederike, Jacobson, Aaron, Jansen, Jacobus F A, Jenkins, Christopher W, Johnston, Stephen J, Juchem, Christoph, Kangarlu, Alayar, Kerr, Adam B, Landheer, Karl, Lange, Thomas, Lee, Phil, Levendovszky, Swati Rane, Limperopoulos, Catherine, Liu, Feng, Lloyd, William, Lythgoe, David J, Machizawa, Maro G, MacMillan, Erin L, Maddock, Richard J, Manzhurtsev, Andrei V, Martinez-Gudino, María L, Miller, Jack J, Mirzakhanian, Heline, Moreno-Ortega, Marta, Mullins, Paul G, Near, Jamie, Noeske, Ralph, Nordhøy, Wibeke, Oeltzschner, Georg, Osorio-Duran, Raul, Otaduy, Maria C G, Pasaye, Erick H, Peeters, Ronald, Peltier, Scott J, Pilatus, Ulrich, Polomac, Nenad, Porges, Eric C, Pradhan, Subechhya, Prisciandaro, James Joseph, Puts, Nicolaas A, Rae, Caroline D, Reyes-Madrigal, Francisco, Roberts, Timothy P L, Robertson, Caroline E, Rosenberg, Jens T, Rotaru, Diana-Georgiana, O'Gorman Tuura, Ruth L, Saleh, Muhammad G, Sandberg, Kristian, Sangill, Ryan, Schembri, Keith, Schrantee, Anouk, Semenova, Natalia A, Singel, Debra, Sitnikov, Rouslan, Smith, Jolinda, Song, Yulu, Stark, Craig, Stoffers, Diederick, Swinnen, Stephan P, Tain, Rongwen, Tanase, Costin, Tapper, Sofie, Tegenthoff, Martin, Thiel, Thomas, Thioux, Marc, Truong, Peter, van Dijk, Pim, Vella, Nolan, Vidyasagar, Rishma, Vovk, Andrej, Wang, Guangbin, Westlye, Lars T, Wilbur, Timothy K, Willoughby, William R, Wilson, Martin, Wittsack, Hans-Jörg, Woods, Adam J, Wu, Yen-Chien, Xu, Junqian, Lopez, Maria Yanez, Yeung, David K W, Zhao, Qun, Zhou, Xiaopeng, Zupan, Gasper, Edden, Richard A E, Hui, Steve C N, Mikkelsen, Mark, Zöllner, Helge J, Ahluwalia, Vishwadeep, Alcauter, Sarael, Baltusis, Laima, Barany, Deborah A, Barlow, Laura R, Becker, Robert, Berman, Jeffrey I, Berrington, Adam, Bhattacharyya, Pallab K, Blicher, Jakob Udby, Bogner, Wolfgang, Brown, Mark S, Calhoun, Vince D, Castillo, Ryan, Cecil, Kim M, Choi, Yeo Bi, Chu, Winnie C W, Clarke, William T, Craven, Alexander R, Cuypers, Koen, Dacko, Michael, de la Fuente-Sandoval, Camilo, Desmond, Patricia, Domagalik, Aleksandra, Dumont, Julien, Duncan, Niall W, Dydak, Ulrike, Dyke, Katherine, Edmondson, David A, Ende, Gabriele, Ersland, Lars, Evans, C John, Fermin, Alan S R, Ferretti, Antonio, Fillmer, Ariane, Gong, Tao, Greenhouse, Ian, Grist, James T, Gu, Meng, Harris, Ashley D, Hat, Katarzyna, Heba, Stefanie, Heckova, Eva, Hegarty, John P, Heise, Kirstin-Friederike, Jacobson, Aaron, Jansen, Jacobus F A, Jenkins, Christopher W, Johnston, Stephen J, Juchem, Christoph, Kangarlu, Alayar, Kerr, Adam B, Landheer, Karl, Lange, Thomas, Lee, Phil, Levendovszky, Swati Rane, Limperopoulos, Catherine, Liu, Feng, Lloyd, William, Lythgoe, David J, Machizawa, Maro G, MacMillan, Erin L, Maddock, Richard J, Manzhurtsev, Andrei V, Martinez-Gudino, María L, Miller, Jack J, Mirzakhanian, Heline, Moreno-Ortega, Marta, Mullins, Paul G, Near, Jamie, Noeske, Ralph, Nordhøy, Wibeke, Oeltzschner, Georg, Osorio-Duran, Raul, Otaduy, Maria C G, Pasaye, Erick H, Peeters, Ronald, Peltier, Scott J, Pilatus, Ulrich, Polomac, Nenad, Porges, Eric C, Pradhan, Subechhya, Prisciandaro, James Joseph, Puts, Nicolaas A, Rae, Caroline D, Reyes-Madrigal, Francisco, Roberts, Timothy P L, Robertson, Caroline E, Rosenberg, Jens T, Rotaru, Diana-Georgiana, O'Gorman Tuura, Ruth L, Saleh, Muhammad G, Sandberg, Kristian, Sangill, Ryan, Schembri, Keith, Schrantee, Anouk, Semenova, Natalia A, Singel, Debra, Sitnikov, Rouslan, Smith, Jolinda, Song, Yulu, Stark, Craig, Stoffers, Diederick, Swinnen, Stephan P, Tain, Rongwen, Tanase, Costin, Tapper, Sofie, Tegenthoff, Martin, Thiel, Thomas, Thioux, Marc, Truong, Peter, van Dijk, Pim, Vella, Nolan, Vidyasagar, Rishma, Vovk, Andrej, Wang, Guangbin, Westlye, Lars T, Wilbur, Timothy K, Willoughby, William R, Wilson, Martin, Wittsack, Hans-Jörg, Woods, Adam J, Wu, Yen-Chien, Xu, Junqian, Lopez, Maria Yanez, Yeung, David K W, Zhao, Qun, Zhou, Xiaopeng, Zupan, Gasper, and Edden, Richard A E

Abstract

PURPOSE: Heating of gradient coils and passive shim components is a common cause of instability in the B0 field, especially when gradient intensive sequences are used. The aim of the study was to set a benchmark for typical drift encountered during MR spectroscopy (MRS) to assess the need for real-time field-frequency locking on MRI scanners by comparing field drift data from a large number of sites.METHOD: A standardized protocol was developed for 80 participating sites using 99 3T MR scanners from 3 major vendors. Phantom water signals were acquired before and after an EPI sequence. The protocol consisted of: minimal preparatory imaging; a short pre-fMRI PRESS; a ten-minute fMRI acquisition; and a long post-fMRI PRESS acquisition. Both pre- and post-fMRI PRESS were non-water suppressed. Real-time frequency stabilization/adjustment was switched off when appropriate. Sixty scanners repeated the protocol for a second dataset. In addition, a three-hour post-fMRI MRS acquisition was performed at one site to observe change of gradient temperature and drift rate. Spectral analysis was performed using MATLAB. Frequency drift in pre-fMRI PRESS data were compared with the first 5:20 minutes and the full 30:00 minutes of data after fMRI. Median (interquartile range) drifts were measured and showed in violin plot. Paired t-tests were performed to compare frequency drift pre- and post-fMRI. A simulated in vivo spectrum was generated using FID-A to visualize the effect of the observed frequency drifts. The simulated spectrum was convolved with the frequency trace for the most extreme cases. Impacts of frequency drifts on NAA and GABA were also simulated as a function of linear drift. Data from the repeated protocol were compared with the corresponding first dataset using Pearson's and intraclass correlation coefficients (ICC).RESULTS: Of the data collected from 99 scanners, 4 were excluded due to various reasons. Thus, data from 95 scanners were ultimately anal

Published
2021

14. The genetic architecture of the human cerebral cortex

Author

Grasby, Katrina L, Jahanshad, Neda, Shatokhina, Natalia, Mirza-Schreiber, Nazanin, Moreira, Jose C V, Mühleisen, Thomas W, Müller-Myhsok, Bertram, Najt, Pablo, Nakahara, Soichiro, Nho, Kwangsik, Olde Loohuis, Loes M, Orfanos, Dimitri Papadopoulos, Pearson, John F, Zsembik, Leo C P, Pitcher, Toni L, Pütz, Benno, Quidé, Yann, Ragothaman, Anjanibhargavi, Rashid, Faisal M, Reay, William R, Redlich, Ronny, Reinbold, Céline S, Repple, Jonathan, Richard, Geneviève, Thomopoulos, Sophia I, Riedel, Brandalyn C, Risacher, Shannon L, Rocha, Cristiane S, Mota, Nina Roth, Salminen, Lauren, Saremi, Arvin, Saykin, Andrew J, Schlag, Fenja, Schmaal, Lianne, Schofield, Peter R, Zhu, Alyssa H, Secolin, Rodrigo, Shapland, Chin Yang, Shen, Li, Shin, Jean, Shumskaya, Elena, Sønderby, Ida E, Sprooten, Emma, Tansey, Katherine E, Teumer, Alexander, Thalamuthu, Anbupalam, Strike, Lachlan T, Tordesillas-Gutiérrez, Diana, Turner, Jessica A, Uhlmann, Anne, Vallerga, Costanza Ludovica, van der Meer, Dennis, van Donkelaar, Marjolein M J, van Eijk, Liza, van Erp, Theo G M, van Haren, Neeltje E M, van Rooij, Daan, Agartz, Ingrid, van Tol, Marie-José, Veldink, Jan H, Verhoef, Ellen, Walton, Esther, Wang, Mingyuan, Wang, Yunpeng, Wardlaw, Joanna M, Wen, Wei, Westlye, Lars T, Whelan, Christopher D, Alhusaini, Saud, Witt, Stephanie H, Wittfeld, Katharina, Wolf, Christiane, Wolfers, Thomas, Wu, Jing Qin, Yasuda, Clarissa L, Zaremba, Dario, Zhang, Zuo, Zwiers, Marcel P, Artiges, Eric, Almeida, Marcio A A, Assareh, Amelia A, Ayesa-Arriola, Rosa, Belger, Aysenil, Brandt, Christine L, Brown, Gregory G, Cichon, Sven, Curran, Joanne E, Davies, Gareth E, Degenhardt, Franziska, Dennis, Michelle F, Alnæs, Dag, Dietsche, Bruno, Djurovic, Srdjan, Doherty, Colin P, Espiritu, Ryan, Garijo, Daniel, Gil, Yolanda, Gowland, Penny A, Green, Robert C, Häusler, Alexander N, Heindel, Walter, Amlien, Inge K, Ho, Beng-Choon, Hoffmann, Wolfgang U, Holsboer, Florian, Homuth, Georg, Hosten, Norbert, Jack, Clifford R, Jang, MiHyun, Jansen, Andreas, Kimbrel, Nathan A, Kolskår, Knut, Painter, Jodie N, Andersson, Micael, Koops, Sanne, Krug, Axel, Lim, Kelvin O, Luykx, Jurjen J, Mathalon, Daniel H, Mather, Karen A, Mattay, Venkata S, Matthews, Sarah, Mayoral Van Son, Jaqueline, McEwen, Sarah C, Ard, Tyler, Melle, Ingrid, Morris, Derek W, Mueller, Bryon A, Nauck, Matthias, Nordvik, Jan E, Nöthen, Markus M, O'Leary, Daniel S, Opel, Nils, Martinot, Marie-Laure Paillère, Pike, G Bruce, Armstrong, Nicola J, Preda, Adrian, Quinlan, Erin B, Rasser, Paul E, Ratnakar, Varun, Reppermund, Simone, Steen, Vidar M, Tooney, Paul A, Torres, Fábio R, Veltman, Dick J, Voyvodic, James T, Ashley-Koch, Allison, Whelan, Robert, White, Tonya, Yamamori, Hidenaga, Adams, Hieab H H, Bis, Joshua C, Debette, Stephanie, Decarli, Charles, Fornage, Myriam, Gudnason, Vilmundur, Hofer, Edith, Atkins, Joshua R, Ikram, M Arfan, Launer, Lenore, Longstreth, W. 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Tremont, Geoffrey, Bartzokis, George, Groenewold, Nynke A, Hsiung, Ging-Yuek Robin, Malferrari, Giulia, Chiang, Gloria, Pearlson, Godfrey D, Liang, Grace, Jicha, Greg, Sorensen, Greg, Todd, Gretchen, Jimenez, Gustavo, Grotegerd, Dominik, Zare, Habil, Grabe, Hans Jörgen, Vanderswag, Helen, Schmidt, Helena, Venkov, Heli, Lemaitre, Hervé, Gurholt, Tiril P, Grossman, Hillel, Shill, Holly, Soares, Holly, Lin, Honghuang, Capote, Horacio, Bergman, Howard, Chertkow, Howard, Feldman, Howard, Fillit, Howard, Rosen, Howard J, Gutman, Boris A, Koleva, Hristina, Fernandez, Hubert, Garavan, Hugh, Shim, Hyungsub, Grachev, Igor D, Richard, Irene, Filippi, Irina, Rachinsky, Irina, Wurster, Isabel, Lind, Penelope A, Hansell, Narelle K, Mintzer, Jacobo, Ziolkowski, Jaimie, Brewer, James, Lah, James J, Leverenz, James, Becker, James T, Tetrud, James, Singleton-Garvin, Jamika, Egebjerg, Jan, Cellar, Janet S, Harris, Mathew A, Pentilla, Jani, Brosch, Jared R, Tinklenberg, Jared, Karlawish, Jason H, Meyer, Javier Villanueva, Himali, Jayandra J, Poline, Jean-Baptiste, Gunter, Jeff, Kaye, Jeffrey A, Harrison, Marc B, Dalley, Jeffrey, Burns, Jeffrey M, Petrella, Jeffrey R, Mule, Jennifer, Salazar, Jennifer, Rotter, Jerome I, Yesavage, Jerome, Cedarbaum, Jesse, Jiang, Jiyang, Haswell, Courtney C, Allard, Joanne, Lord, Joanne L, Hetelle, Joel, Kwok, John B, Brockington, John, Morris, John C, Hsiao, John, Morris, John, Olichney, John, Trojanowki, John Q, Hauser, Michael, Rogers, John, Seibyl, John, Yankey, Jon, Dubow, Jordan S, Jankovic, Joseph, Quinn, Joseph, Kass, Joseph S, Taylor, Joy L, Heidebrink, Judith L, Herms, Stefan, Trollor, Julian, Fröhner, Juliane, Anderson, Karen, Blank, Karen, Crawford, Karen, Smith, Karen Ekstam, Bell, Karen L, Williams, Karen, Kieburtz, Karl, Heslenfeld, Dirk J, Gauss, Katharina, Gloer, Katherine, Johnson, Kathleen, Tingus, Kathleen, DeMarco, Kathryn, Sink, Kaycee M, Hawkins, Keith A, Johnson, Keith A, Kantarci, Kejal, Ho, New Fei, Faber, Kelley, Harless, Kelly, Makino, Kelly M, Marek, Kenneth, Spicer, Kenneth, Shianna, Kevin, Chen, Kewei, Nam, Ki Won, Martin, Kim, Poki-Walker, Kim, Hoehn, David, Seppi, Klaus, Johnson, Kris, Fargher, Kristin, Lipowski, Kristine, Espay, Kristy, Womack, Kyle, Chahine, Lama, Flashman, Laura A, Daedelow, Laura, Hoffmann, Per, Leary, Laura, Beckett, Laurel, Honig, Lawrence S, Thal, Leon, Shaw, Leslie M, Kuller, Lew, Apostolova, Liana, Teodoro, Liberty, Rees, Linda, Pizzagalli, Fabrizio, Holleran, Laurena, Lewis, Lindsay, Hergesheimer, Lindsey, Silbert, Lisa C, Ravdin, Lisa, Taylor-Reinwald, Lisa, Uribe, Liz, Schneider, Lon S, Daiello, Lori A, Richer, Louis, Poustka, Luise, Hoogman, Martine, Pirpamer, Lukas, Mesulam, M Marcel, Ismail, M Saleem, Ranola, Madelaine, Korecka, Magdalena, Raichle, Marc, Seltzer, Marc, van der Brug, Marcel, Hottenga, Jouke-Jan, Mesulam, Marek-Marsel, Carrillo, Maria, Carroll, Maria, Knol, Maria J, Kataki, Maria, Greig-Custo, Maria T, Paillere, Marie-Laure, Albert, Marilyn, Love, Marissa Natelson, Ikeda, Masashi, Mintun, Mark A, Frasier, Mark, Logue, Mark, Minton, Mark, Loeffler, Markus, Scholz, Markus, Baca, Marne, Farlow, Martin R, Sadowski, Martin, Janowitz, Deborah, Creech, Mary L, Hynes, Mary L, Quiceno, Mary, Oakley, MaryAnn, Harris, Mat, Senjem, Matt, Bernstein, Matthew, Panizzon, Matthew S, Stern, Matthew, Becerra, Mauricio, Jansen, Iris E, Witbracht, Megan, Vernooij, Meike W, Brandabur, Melanie, Keltz, Melanie, Lamar, Melissa, Yang, Mia, Ahlijanian, Michael, Borrie, Michael, Neale, Michael C, Donohue, Michael, Jia, Tianye, Lyons, Michael J, Lin, Michael, Rapp, Michael, Smolka, Michael, Weiner, Michael W, Weiner, Michael, Figurski, Michal, Perron, Michel, Assaly, Michele, Luciano, Michelle, Jockwitz, Christiane, Rainka, Michelle, Dang, Mimi, Sheikh, Mohammed O, Ghanbari, Mohsen, Gaikwad, Mrunalini, Chowdhury, Munir, Trncic, Nadira, Amin, Najaf, Johnson, Nancy, Kanai, Ryota, Kowalksi, Nancy, Monahan, Nancy, Gillespie, Nathan A, Pacini, Nathaniel, 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Silverstein, Rebecca, Sperling, Reisa A, Wilson, Renee, Carson, Richard E, Frank, Richard, El Khouli, Riham, Koeppe, Robert A, Santulli, Robert B, Knapp, Michael, Hauser, Robert, Umek, Robert, Radtke, Rodney, Killiany, Ronald, Petersen, Ronald, Rodriguez, Rosemarie, Miranda, Ruben, Knodt, Annchen R, Bruehl, Ruediger, Xia, Rui, Swerdlow, Russell H, Ottmann, Ruth, Millenet, Sabina, Borges-Neto, Salvador, Frank, Samuel, Black, Sandra, Weintraub, Sandra, Obradov, Sanja, Krämer, Bernd, Asthana, Sanjay, Vaishnavi, Sanjeev, Dolen, Sara, Mason, Sara S, Hohmann, Sarah, Kremen, Sarah, Miller, Sarah, Walter, Sarah, Herring, Scott, Neu, Scott, Lam, Max, Aydin, Semiha, Ahmad, Shahzad, Harlan, Sherry, Sirrel, Sherye A, Lasch, Shirley, Hu, Shu-Ching, Li, Shuo, Kittur, Smita, Chowdhury, Sohini, Lancaster, Thomas M, Pawluczyk, Sonia, Maingault, Sophie, Schneider, Stacy, Seiler, Stephan, Guthrie, Stephanie, Kielb, Stephanie, Reeder, Stephanie, Correia, Stephen, Pasternak, Stephen, McMahon, Mary Agnes B, Lee, Phil H, Salloway, Stephen, Johnson, Sterling, Williams, Steve, Chao, Steven, Arnold, Steven E, Paul, Steven, Potkin, Steven, Factor, Stewart, Isaacson, Stuart, Lett, Tristram A, Kim, Sungeun, Ainscough, Susan, Schultz, Susan K, Landau, Susan, Mendick, Susan, Rountree, Susan, Ostrowizki, Suzanne, Veillette, Suzanne, van der Lee, Sven J, Desrivieres, Sylvane, Lewis, Lindsay B, Lee, T-Y, Simuni, Tanya, Foroud, Tatiana, Foroud, Tatiana M, Wong, Terence Z, Villena, Teresa, Comery, Thomas, Obisesan, Thomas O, Lopes-Cendes, Iscia, Banaschewski, Tobias, Sherer, Todd, Montine, Tom, Paus, Tomáš, Robbins, Trevor, Bromberg, Uli, Völker, Uwe, Pavlik, Valory, Arnedo, Vanessa, Kiyasova, Vera, Bates, Vernice, Logovinsky, Veronika, Sossi, Vesna, Shibley, Victoria, Frouin, Vincent, Lee, Virginia, Poewe, Werner, Jagust, William, Brooks, William M, Macciardi, Fabio, Pavlosky, William, Potter, William, Kremen, William S, Longstreth, William T, Niessen, Wiro J, Jian, Xueqiu, Stern, Yaakov, Saba, Yasaman, Cabrera, Yuliana, Grimmer, Yvonne, Marquand, Andre F, Khachaturian, Zaven, Mari, Zoltan, Mathias, Samuel R, Melzer, Tracy R, Milaneschi, Yuri, Interdisciplinary Centre Psychopathology and Emotion regulation (ICPE), Guided Treatment in Optimal Selected Cancer Patients (GUTS), Clinical Cognitive Neuropsychiatry Research Program (CCNP), Movement Disorder (MD), Alzheimer’s Disease Neuroimaging Initiative, CHARGE Consortium, EPIGEN Consortium, IMAGEN Consortium, SYS Consortium, Parkinson’s Progression Markers Initiative, Stochastics, Biological Psychology, APH - Health Behaviors & Chronic Diseases, APH - Mental Health, Science and Society, Cognitive Psychology, IBBA, APH - Personalized Medicine, Complex Trait Genetics, APH - Methodology, Clinical Neuropsychology, Sociology and Social Gerontology, Amsterdam Neuroscience - Complex Trait Genetics, RS: MHeNs - R2 - Mental Health, Psychiatrie & Neuropsychologie, Klinische Genetica, RS: GROW - R4 - Reproductive and Perinatal Medicine, MUMC+: DA Klinische Genetica (5), Neurology, Psychiatry, Pediatric surgery, Amsterdam Reproduction & Development (AR&D), Human genetics, APH - Digital Health, Psychology, Precision Medicine Institute of Psychiatry, Child and Adolescent Psychiatry / Psychology, Radiology & Nuclear Medicine, Clinical Genetics, Epidemiology, Medical Informatics, Service NEUROSPIN (NEUROSPIN), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Neurodegeneratives Diseases Institute (IMN-UMR CNRS 5293), Centre National de la Recherche Scientifique (CNRS), General Paediatrics, ARD - Amsterdam Reproduction and Development, Direction de Recherche Fondamentale (CEA) (DRF (CEA)), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
0301 basic medicine, Netherlands Twin Register (NTR), [SDV]Life Sciences [q-bio], LOCI, Genome-wide association study, Brain mapping, 0302 clinical medicine, Cognition, Cortex (anatomy), ComputingMilieux_MISCELLANEOUS, Cerebral Cortex, 0303 health sciences, Brain Mapping, Multidisciplinary, COMMON VARIANTS, Parkinson Disease, Organ Size, Central sulcus, Magnetic Resonance Imaging, medicine.anatomical_structure, Cerebral cortex, Neuroinformatics, EXPRESSION, endocrine system, central sulcus, SURFACE-AREA, Biology, Article, 03 medical and health sciences, SDG 3 - Good Health and Well-being, Genetic variation, medicine, Attention deficit hyperactivity disorder, Humans, General, Gene, METAANALYSIS, 030304 developmental biology, Progenitor, CORTICAL SULCI, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], Genetic variants, Genetic Variation, Attention Deficit Disorder with Hyperactivity, Genetic Loci, Genome-Wide Association Study, functional annotation, medicine.disease, Genetic architecture, 030104 developmental biology, Evolutionary biology, OBSERVER-INDEPENDENT CHARACTERIZATION, Multiple comparisons problem, ddc:320, genome-wide association, Neuroscience, 030217 neurology & neurosurgery
Abstract

Enhancing NeuroImaging Genetics through Meta-Analysis Consortium (ENIGMA)—Genetics working group., The cerebral cortex underlies our complex cognitive capabilities, yet little is known about the specific genetic loci that influence human cortical structure. To identify genetic variants that affect cortical structure, we conducted a genome-wide association meta-analysis of brain magnetic resonance imaging data from 51,665 individuals. We analyzed the surface area and average thickness of the whole cortex and 34 regions with known functional specializations. We identified 199 significant loci and found significant enrichment for loci influencing total surface area within regulatory elements that are active during prenatal cortical development, supporting the radial unit hypothesis. Loci that affect regional surface area cluster near genes in Wnt signaling pathways, which influence progenitor expansion and areal identity. Variation in cortical structure is genetically correlated with cognitive function, Parkinson's disease, insomnia, depression, neuroticism, and attention deficit hyperactivity disorder.

Published
2020

15. Metabolite cycled liver 1 H MRS on a 7 T parallel transmit system

Author

Highfield Research Group, Cancer, Divisie Beeld, Brain, Circulatory Health, Regenerative Medicine and Stem Cells, Xavier, Aline, Arteaga de Castro, Catalina, Andia, Marcelo E, Luijten, Peter R, Klomp, Dennis W, Fillmer, Ariane, Prompers, Jeanine J, Highfield Research Group, Cancer, Divisie Beeld, Brain, Circulatory Health, Regenerative Medicine and Stem Cells, Xavier, Aline, Arteaga de Castro, Catalina, Andia, Marcelo E, Luijten, Peter R, Klomp, Dennis W, Fillmer, Ariane, and Prompers, Jeanine J

Published
2020

16. In vivo detection of teriflunomide-derived fluorine signal during neuroinflammation using fluorine MR spectroscopy

Author

Prinz, Christian, primary, Starke, Ludger, additional, Millward, Jason M., additional, Fillmer, Ariane, additional, Delgado, Paula Ramos, additional, Waiczies, Helmar, additional, Pohlmann, Andreas, additional, Rothe, Michael, additional, Nazaré, Marc, additional, Paul, Friedemann, additional, Niendorf, Thoralf, additional, and Waiczies, Sonia, additional

Published
2021
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17. European Ultrahigh-Field Imaging Network for Neurodegenerative Diseases (EUFIND)

Author

Zorglijn AN/AAN Medisch, Brain, Circulatory Health, MS Radiologie, Researchgr. Neuroradiologie, Onderzoek Beeld, Highfield Research Group, Regenerative Medicine and Stem Cells, Cancer, Düzel, Emrah, Acosta-Cabronero, Julio, Berron, David, Biessels, Geert Jan, Björkman-Burtscher, Isabella, Bottlaender, Michel, Bowtell, Richard, Buchem, Mark V, Cardenas-Blanco, Arturo, Boumezbeur, Fawzi, Chan, Dennis, Clare, Stuart, Costagli, Mauro, de Rochefort, Ludovic, Fillmer, Ariane, Gowland, Penny, Hansson, Oskar, Hendrikse, Jeroen, Kraff, Oliver, Ladd, Mark E, Ronen, Itamar, Petersen, Esben, Rowe, James B, Siebner, Hartwig, Stoecker, Tony, Straub, Sina, Tosetti, Michela, Uludag, Kamil, Vignaud, Alexandre, Zwanenburg, Jaco, Speck, Oliver, Zorglijn AN/AAN Medisch, Brain, Circulatory Health, MS Radiologie, Researchgr. Neuroradiologie, Onderzoek Beeld, Highfield Research Group, Regenerative Medicine and Stem Cells, Cancer, Düzel, Emrah, Acosta-Cabronero, Julio, Berron, David, Biessels, Geert Jan, Björkman-Burtscher, Isabella, Bottlaender, Michel, Bowtell, Richard, Buchem, Mark V, Cardenas-Blanco, Arturo, Boumezbeur, Fawzi, Chan, Dennis, Clare, Stuart, Costagli, Mauro, de Rochefort, Ludovic, Fillmer, Ariane, Gowland, Penny, Hansson, Oskar, Hendrikse, Jeroen, Kraff, Oliver, Ladd, Mark E, Ronen, Itamar, Petersen, Esben, Rowe, James B, Siebner, Hartwig, Stoecker, Tony, Straub, Sina, Tosetti, Michela, Uludag, Kamil, Vignaud, Alexandre, Zwanenburg, Jaco, and Speck, Oliver

Published
2019

18. Constrained image-based B0 shimming accounting for 'local minimum traps' in the optimization and field inhomogeneities outside the region of interest

Author

Fillmer, Ariane, Kirchner, Thomas, Cameron, Donnie, Henning, Anke, University of Zurich, and Fillmer, Ariane

Subjects
170 Ethics, 2741 Radiology, Nuclear Medicine and Imaging, 610 Medicine & health, 10237 Institute of Biomedical Engineering
Abstract

Purpose To improve B0 shimming for applications in high- and ultrahigh-field magnetic resonance imaging and magnetic resonance spectroscopy. Methods An existing image-based constrained B0 shimming algorithm was enhanced using two techniques: (1) A region of less interest was introduced to control B0 field inhomogeneities in the vicinity of the region of interest; (2) multiple sets of starting values were used for the fitting routine, to avoid “getting trapped” in a local minimum of the optimization function. The influence of constraints during the fitting procedure, due to hardware limitations, on the B0 shim result was investigated. The performance of this algorithm was compared to other B0 shim algorithms for typical shim problems in head and body applications at 3T and 7T. Results Utilization of a weighted region of less interest lead to a significant gain in B0 homogeneity adjacent to the region of interest. The loss of B0 quality due to the enlarged total shim volume within the region of interest remained minimal, allowing for improved artifact reduction in magnetic resonance spectroscopic imaging. Multiple sets of starting values and consideration of shim field constraints led to an additional gain in B0 shim quality. Conclusion The proposed algorithm allows for more flexible control of B0 inhomogeneities and, hence, enables gains in image and spectral quality for MR applications.

Published
2015

20. Non-Water-Suppressed 1H MR Spectroscopy with Orientational Prior Knowledge Shows Potential for Separating Intra- and Extramyocellular Lipid Signals in Human Myocardium

Author

Fillmer, Ariane; https://orcid.org/0000-0003-3333-6603, Hock, Andreas, Cameron, Donnie, Henning, Anke, Fillmer, Ariane; https://orcid.org/0000-0003-3333-6603, Hock, Andreas, Cameron, Donnie, and Henning, Anke

Abstract

Conditions such as type II diabetes are linked with elevated lipid levels in the heart, and significantly increased risk of heart failure; however, metabolic processes underlying the development of cardiac disease in type II diabetes are not fully understood. Here we present a non-invasive method for in vivo investigation of cardiac lipid metabolism: namely, IVS-McPRESS. This technique uses metabolite-cycled, non-water suppressed 1H cardiac magnetic resonance spectroscopy with prospective and retrospective motion correction. High-quality IVS-McPRESS data acquired from healthy volunteers allowed us to investigate the frequency shift of extramyocellular lipid signals, which depends on the myocardial fibre orientation. Assuming consistent voxel positioning relative to myofibres, the myofibre angle with the magnetic field was derived from the voxel orientation. For separation and individual analysis of intra- and extramyocellular lipid signals, the angle myocardial fibres in the spectroscopy voxel take with the magnetic field should be within ±24.5°. Metabolite and lipid concentrations were analysed with respect to BMI. Significant correlations between BMI and unsaturated fatty acids in intramyocellular lipids, and methylene groups in extramyocellular lipids were found. The proposed IVS-McPRESS technique enables non-invasive investigation of cardiac lipid metabolism and may thus be a useful tool to study healthy and pathological conditions.

Published
2017

22. Reduction of voxel bleeding in highly accelerated parallel 1H MRSI by direct control of the spatial response function

Author

Kirchner, Thomas, Fillmer, Ariane, Tsao, Jeffrey, Pruessmann, Klaas Paul, Henning, Anke, University of Zurich, and Henning, Anke

Subjects
170 Ethics, Radiology Nuclear Medicine and imaging, 2741 Radiology, Nuclear Medicine and Imaging, 610 Medicine & health, 10237 Institute of Biomedical Engineering
Abstract

Purpose To substantially improve spatial localization in magnetic resonance spectroscopic imaging (MRSI) accelerated by parallel imaging. This is important in order to make MRSI more reliable as a tool for clinical applications. Methods The sensitivity encoding acceleration technique with spatial overdiscretization is applied for the reconstruction of parallel MRSI. In addition, the spatial response function is optimized by minimizing its deviation from a previously chosen target function. This modified minimum-norm sensitivity encoding-MRSI reconstruction approach is applied in this article for in vivo pulse-acquire MRSI of human brain at 7T with simulated acceleration factors of 2, 4, and 9 as well as actual 4-fold accelerated MRSI. Results The sidelobes of the spatial response function are significantly suppressed, which reduces far-reaching voxel bleeding. At the same time, the major enlargement of the effective voxel size, which would be introduced by conventional k-space apodization methods, is largely avoided. Regularization allows for a practical trade-off between noise minimization, effective voxel size, and unaliasing. Although not aiming at increasing the nominal spatial resolution, a better spatial specificity is achieved. Conclusion Simultaneous suppression of short- and far-reaching voxel bleeding in MRSI is analyzed and reconstruction of highly accelerated parallel in vivo MRSI is demonstrated.

Published
2015

23. Hardware and Algorithmic Advances in B₀ Shimming for High and Ultra-High Field MRI and MRS

Author

Fillmer, Ariane, Rudin, Markus, and Henning, Anke

Subjects
STRONG MAGNETIC FIELDS (MAGNETISM), NUCLEAR MAGNETIC RESONANCE IMAGING + NUCLEAR MAGNETIC RESONANCE TOMOGRAPHY (MEDICAL DIAGNOSTICS), KERNRESONANZSPEKTROSKOPIE (BIOLOGISCHE TECHNIKEN), STARKE MAGNETFELDER (MAGNETISMUS), KERNSPINRESONANZ-ABBILDUNGSVERFAHREN + KERNSPINRESONANZ-TOMOGRAPHIE (MEDIZINISCHE DIAGNOSTIK), NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY (BIOLOGICAL TECHNIQUES), ddc:610, Medical sciences, medicine
Published
2015

25. Pentafluorosulfanyl (SF 5 ) as a Superior 19 F Magnetic Resonance Reporter Group: Signal Detection and Biological Activity of Teriflunomide Derivatives

Author

Prinz, Christian, Starke, Ludger, Ramspoth, Tizian-Frank, Kerkering, Janis, Martos Riaño, Vera, Paul, Jérôme, Neuenschwander, Martin, Oder, Andreas, Radetzki, Silke, Adelhoefer, Siegfried, Ramos Delgado, Paula, Aravina, Mariya, Millward, Jason M., Fillmer, Ariane, Paul, Friedemann, Siffrin, Volker, von Kries, Jens-Peter, Niendorf, Thoralf, Nazaré, Marc, and Waiczies, Sonia

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26. Non-Water-Suppressed 1H MR Spectroscopy with Orientational Prior Knowledge Shows Potential for Separating Intra- and Extramyocellular Lipid Signals in Human Myocardium

Author

Donnie Cameron, A Fillmer, Anke Henning, Andreas Hock, University of Zurich, and Fillmer, Ariane

Subjects
1h nmr spectroscopy, Metabolite, lcsh:Medicine, 610 Medicine & health, 030204 cardiovascular system & hematology, computer.software_genre, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, Nuclear magnetic resonance, In vivo, Voxel, medicine, Intramyocellular lipids, lcsh:Science, 1000 Multidisciplinary, Multidisciplinary, medicine.diagnostic_test, Chemistry, lcsh:R, Lipid metabolism, medicine.disease, 10054 Clinic for Psychiatry, Psychotherapy, and Psychosomatics, Heart failure, lcsh:Q, computer, Electrocardiography
Abstract

Conditions such as type II diabetes are linked with elevated lipid levels in the heart, and significantly increased risk of heart failure; however, metabolic processes underlying the development of cardiac disease in type II diabetes are not fully understood. Here we present a non-invasive method for in vivo investigation of cardiac lipid metabolism: namely, IVS-McPRESS. This technique uses metabolite-cycled, non-water suppressed 1H cardiac magnetic resonance spectroscopy with prospective and retrospective motion correction. High-quality IVS-McPRESS data acquired from healthy volunteers allowed us to investigate the frequency shift of extramyocellular lipid signals, which depends on the myocardial fibre orientation. Assuming consistent voxel positioning relative to myofibres, the myofibre angle with the magnetic field was derived from the voxel orientation. For separation and individual analysis of intra- and extramyocellular lipid signals, the angle myocardial fibres in the spectroscopy voxel take with the magnetic field should be within ±24.5°. Metabolite and lipid concentrations were analysed with respect to BMI. Significant correlations between BMI and unsaturated fatty acids in intramyocellular lipids, and methylene groups in extramyocellular lipids were found. The proposed IVS-McPRESS technique enables non-invasive investigation of cardiac lipid metabolism and may thus be a useful tool to study healthy and pathological conditions., Scientific Reports, 7 (1), ISSN:2045-2322

Published
2017

27. Fast iterative pre-emphasis calibration method enabling third-order dynamic shim updated fMRI

Author

Anke Henning, A Fillmer, Klaas P. Pruessmann, Matteo Pavan, S J Vannesjo, Milan Scheidegger, University of Zurich, and Fillmer, Ariane

Subjects
Computer science, Field of view, 610 Medicine & health, 030218 nuclear medicine & medical imaging, law.invention, 170 Ethics, 03 medical and health sciences, Superposition principle, 0302 clinical medicine, Nuclear magnetic resonance, spatio, law, Image Processing, Computer-Assisted, Eddy current, Calibration, Humans, 2741 Radiology, Nuclear Medicine and Imaging, Radiology, Nuclear Medicine and imaging, 10237 Institute of Biomedical Engineering, B0 shimming, resting, dynamic shim updating, pre, eddy current compensation, emphasis calibration, temporal field monitoring, Brain, Signal Processing, Computer-Assisted, Shim (magnetism), Magnetic Resonance Imaging, Field monitoring, Third order, Amplitude, state fMRI, Algorithm, Algorithms, 030217 neurology & neurosurgery
Abstract

PURPOSE: To calibrate a pre-emphasis to sufficiently compensate eddy currents for application of dynamic shim updating to fMRI without extension of scan times. METHODS: Eddy current effects induced into all shim terms up to third-order were characterized by spatiotemporal field monitoring, using a third-order field camera. Pre-emphasis settings were derived from the measurements and iteratively evaluated and refined. The calibrated pre-emphasis was applied to slice-wise dynamic shim updating in combination with a dynamic excitation frequency (F0) determination and a slice-wise B0 optimization routine for in vivo echo planar imaging and resting-state functional MRI. RESULTS: The described method for pre-emphasis calibration led to settling times of remaining eddy current effects below 2 ms, allowing for the application of dynamic shim updating to fMRI without extension of scan times or induction of eddy current related artifacts. A dynamic F0 determination compensates frequency shifts induced by the superposition of different shim fields, and therefore, prevents an image shift within the field of view. Hardware limitations necessitate the reduction of the maximum applicable B0 shim field amplitudes and restrict the shim performance. CONCLUSION: The proposed method enables accurate pre-emphasis calibration, and therefore, the application of dynamic shim updating to fMRI. Magn Reson Med, 2015. © 2015 Wiley Periodicals, Inc.

Published
2016

28. Non-Water-Suppressed 1 H MR Spectroscopy with Orientational Prior Knowledge Shows Potential for Separating Intra- and Extramyocellular Lipid Signals in Human Myocardium.

Author

Fillmer A, Hock A, Cameron D, and Henning A

Subjects
Body Mass Index, Diabetes Mellitus, Type 2 metabolism, Diabetes Mellitus, Type 2 pathology, Electrocardiography, Extracellular Space, Fatty Acids, Unsaturated analysis, Humans, Lipid Metabolism, Lipids analysis, Myocardium metabolism, Proton Magnetic Resonance Spectroscopy
Abstract

Conditions such as type II diabetes are linked with elevated lipid levels in the heart, and significantly increased risk of heart failure; however, metabolic processes underlying the development of cardiac disease in type II diabetes are not fully understood. Here we present a non-invasive method for in vivo investigation of cardiac lipid metabolism: namely, IVS-McPRESS. This technique uses metabolite-cycled, non-water suppressed 1 H cardiac magnetic resonance spectroscopy with prospective and retrospective motion correction. High-quality IVS-McPRESS data acquired from healthy volunteers allowed us to investigate the frequency shift of extramyocellular lipid signals, which depends on the myocardial fibre orientation. Assuming consistent voxel positioning relative to myofibres, the myofibre angle with the magnetic field was derived from the voxel orientation. For separation and individual analysis of intra- and extramyocellular lipid signals, the angle myocardial fibres in the spectroscopy voxel take with the magnetic field should be within ±24.5°. Metabolite and lipid concentrations were analysed with respect to BMI. Significant correlations between BMI and unsaturated fatty acids in intramyocellular lipids, and methylene groups in extramyocellular lipids were found. The proposed IVS-McPRESS technique enables non-invasive investigation of cardiac lipid metabolism and may thus be a useful tool to study healthy and pathological conditions.

Published
2017
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