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Your search keyword '"Lagendijk, J.J.W."' showing total 305 results
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305 results on '"Lagendijk, J.J.W."'

13. MRI guidance for breast cancer radiotherapy

Author

Lagendijk, J.J.W., Bongard, H.J.G.D. van den, Houweling, A.C., Groot Koerkamp, Maureen Leonie, Lagendijk, J.J.W., Bongard, H.J.G.D. van den, Houweling, A.C., and Groot Koerkamp, Maureen Leonie

Published
2022

16. Intrafraction motion tracking for MR-Linac prostate radiotherapy

Author

Lagendijk, J.J.W., Raaymakers, B.W., Boer, J.C.J. de, Voort van Zyp, J.R.N. van der, Muinck Keizer, Daan Maarten de, Lagendijk, J.J.W., Raaymakers, B.W., Boer, J.C.J. de, Voort van Zyp, J.R.N. van der, and Muinck Keizer, Daan Maarten de

Published
2021

22. Treatment planning of brain implants using vascular information and a new template technique

Author

Bree, J. De, Lagendijk, J.J.W., Raaymakers, B.W., Bakker, C.J.G., Hulshof, M.C.C.M., Koot, R.W., Hanlo, P.W., Struikmans, H., Ramos, L.M.P., and Battermann, J.J.

Subjects
Implants, Artificial -- Research, Brain tumors -- Care and treatment, Medical imaging equipment -- Research, Hyperthermia treatment systems (Medical care) -- Research, Business, Electronics, Electronics and electrical industries, Health care industry
Abstract

A new template technique has been developed for implanting hyperthermia catheters in the treatment of brain tumors. The technique utilizes an imaging template and a drill template which can be rigidly secured to the head with three skull screws. The anatomic and vascular information needed for hyperthermia treatment planning may be assessed with three-dimensional magnetic resonance (MR) imaging and angiography acquisitions which use a surface coil. In the companioning treatment planning system the catheter positions and lengths and the electrodes in the catheter can be interactively manipulated relative to the anatomy and vasculature. The visualization of the blood vessels relative to the template allows the minimization of the risk on intracranial hemorrhages. This template technique is useful for any brain tumor implants, especially when a large number of catheters are involved. A phantom test has shown that this procedure has an accuracy in the order of 1 mm provided that the MR-related geometry distortions are minimized. Index Terms - Brain implants, implantation template, interstitial hyperthermia, treatment planning.

Published
1998

30. PO-0798 Response assessment to neoadjuvant chemoradiotherapy for esophageal cancer using PET/CT and DW-MRI

Author

Borggreve, A., primary, Goense, L., additional, Van Rossum, P.S.N., additional, Heethuis, S.E., additional, Van Hillegersberg, R., additional, Lagendijk, J.J.W., additional, Van Lier, A.L.H.M.W., additional, Mook, S., additional, Ruurda, J.P., additional, Van Vulpen, M., additional, Voncken, F.E., additional, Aleman, B.M.P., additional, Bartels-Rutten, A., additional, Ma, J., additional, Fang, P., additional, Musall, B.C., additional, Lin, S.H., additional, and Meijer, G.J., additional

Published
2019
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32. EP-1624 First clinical experiences with SBRT on the 1.5 T MR-linac for pelvic lymph node oligometastases

Author

Werensteijn-Honingh, A.M., primary, Kroon, P.S., additional, Winkel, D., additional, Aalbers, E.M., additional, Van Asselen, B., additional, Bol, G.H., additional, Brown, K.J., additional, Eppinga, W.S.C., additional, Glitzner, M., additional, Breugel, E.N. De Groot-van, additional, Hackett, S.L., additional, Intven, M., additional, Kok, J.G.M., additional, Kotte, A.N., additional, Lagendijk, J.J.W., additional, Philippens, M.E.P., additional, Tijssen, R.H.N., additional, Wolthaus, J.W.H., additional, Woodings, S.J., additional, Raaymakers, B.W., additional, and Jürgenliemk-Schulz, I.M., additional

Published
2019
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34. Understanding the physical relations governing the noise navigator

Author

Navest, R.J.M., Mandija, S., Andreychenko, A., Raaijmakers, Aalexander J.E., Lagendijk, J.J.W., van den Berg, C.A.T., Navest, R.J.M., Mandija, S., Andreychenko, A., Raaijmakers, Aalexander J.E., Lagendijk, J.J.W., and van den Berg, C.A.T.

Abstract

Purpose: The noise navigator is a passive way to detect physiological motion occurring in a patient through thermal noise modulations measured by standard clinical radiofrequency receive coils. The aim is to gain a deeper understanding of the potential and applications of physiologically induced thermal noise modulations. Methods: Numerical electromagnetic simulations and MR measurements were performed to investigate the relative contribution of tissue displacement versus modulation of the dielectric lung properties over the respiratory cycle, the impact of coil diameter and position with respect to the body. Furthermore, the spatial motion sensitivity of specific noise covariance matrix elements of a receive array was investigated. Results: The influence of dielectric lung property variations on the noise variance is negligible compared to tissue displacement. Coil size affected the thermal noise variance modulation, but the location of the coil with respect to the body had a larger impact. The modulation depth of a 15 cm diameter stationary coil approximately 3 cm away from the chest (i.e. radiotherapy setup) was 39.7% compared to 4.2% for a coil of the same size on the chest, moving along with respiratory motion. A combination of particular noise covariance matrix elements creates a specific spatial sensitivity for motion. Conclusions: The insight gained on the physical relations governing the noise navigator will allow for optimized use and development of new applications. An optimized combination of elements from the noise covariance matrix offer new ways of performing, e.g. motion tracking.

Published
2019

41. PV-0140: Beam characterization of the Elekta MRI-linac for the first clinical trial

Author

Woodings, S., primary, Bluemink, J.J., additional, De Vries, J.H.W., additional, Niatsetski, Y., additional, Van Veelen, B., additional, Schillings, J., additional, Kok, J.G.M., additional, Wolthaus, J.W.H., additional, Hackett, S.L., additional, Van Asselen, B., additional, Van Zijp, H.M., additional, Pencea, S., additional, Roberts, D.A., additional, Lagendijk, J.J.W., additional, and Raaymakers, B.W., additional

Published
2018
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42. PO-0863: “First in Man” treatments with the MRI-linac provide clinical proof of the concept

Author

Jürgenliemk-Schulz, I.M., primary, Raaymakers, B.W., additional, Van Asselen, B., additional, Bol, G.H., additional, Brown, K.J., additional, Doornaert, P., additional, De Groot-van Breugel, E.N., additional, Hackett, S.L., additional, Kasperts, N., additional, Kiekebosch, I.H., additional, Kerkmeijer, L.G.W., additional, Kok, J.G.M., additional, Kotte, A.N.T., additional, Meijers, L.T.C., additional, Nomden, C.N., additional, Pais, B.R., additional, Philippens, M.E.P., additional, Sikkes, G.G., additional, Tersteeg, J.H.A., additional, Tijssen, R.H.N., additional, Wolthaus, J.W.H., additional, Woodings, S.J., additional, and Lagendijk, J.J.W., additional

Published
2018
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