Search

Your search keyword '"Raaymakers, Bas W."' showing total 513 results
Start Over Author "Raaymakers, Bas W."
513 results on '"Raaymakers, Bas W."'

14. Impact of magnetic resonance-guided versus conventional radiotherapy workflows on organ at risk doses in stereotactic body radiotherapy for lymph node oligometastases

Author

Werensteijn-Honingh, Anita M., Kroon, Petra S., Winkel, Dennis, van Gaal, J. Carlijn, Hes, Jochem, Snoeren, Louk M.W., Timmer, Jaleesa K., Mout, Christiaan C.P., Bol, Gijsbert H., Kotte, Alexis N., Eppinga, Wietse S.C., Intven, Martijn, Raaymakers, Bas W., and Jürgenliemk-Schulz, Ina M.

Published
2022
Full Text
View/download PDF

16. Evaluation of the impact of cardiac implantable electronic devices on cine MRI for real‐time adaptive cardiac radioablation on a 1.5 T MR‐linac.

Author

Akdag, Osman, Mandija, Stefano, Borman, Pim T. S., Tzitzimpasis, Paris, van Lier, Astrid L. H. M. W., Keesman, Rick, Raaymakers, Bas W., and Fast, Martin F.

Subjects
ELECTRONIC equipment, ARTIFICIAL implants, VENTRICULAR tachycardia, IMPLANTABLE cardioverter-defibrillators, GAUSSIAN processes
Abstract

Background: Stereotactic arrhythmia radioablation (STAR) is a novel treatment approach for refractory ventricular tachycardia (VT). The risk of treatment‐induced toxicity and geographic miss can be reduced with online MRI‐guidance on an MR‐linac. However, most VT patients carry cardiac implantable electronic devices (CIED), which compromise MR images. Purpose: Robust MR‐linac imaging sequences are required for cardiac visualization and accurate motion monitoring in presence of a CIED during MRI‐guided STAR. We optimized two clinically available cine sequences for cardiorespiratory motion estimation in presence of a CIED on a 1.5 T MR‐linac. The image quality, motion estimation accuracy, and geometric fidelity using these cine sequences were evaluated. Methods: Clinically available 2D balanced steady‐state free precession (bSSFP, voxel size = 3.0 ×$\times$ 3.0 ×$\times$ 10 mm3, Tscan = 96 ms, bandwidth (BW) = 1884 Hz/px) and T1${\rm T}_{1}$‐spoiled gradient echo (T1${\rm T}_{1}$‐GRE, voxel size = 4.0 ×$ \times$ 4.0 ×$ \times$ 10 mm3, Tscan = 97 ms, BW = 500 Hz/px) sequences were adjusted for real‐time cardiac visualization and cardiorespiratory motion estimation on a 1.5 T Unity MR‐linac (Elekta AB, Stockholm, Sweden), while complying with safety guidelines for MRI in presence of CIEDs (specific absorption rate <$ <$ 2 W/kg and dBdt<$\frac{dB}{dt}<$ 80 mT/s). Cine acquisitions were performed in five healthy volunteers, with and without an implantable cardioverter– defibrillator (ICD) placed on the clavicle, and a VT patient. Generalized divergence‐curl (GDC) deformable image registration (DIR) was used for automated landmark motion estimation in the left ventricle (LV). Gaussian processes (GP), a machine‐learning technique, was trained using GDC landmarks and deployed for real‐time cardiorespiratory motion prediction. B0$B_{0}$‐mapping was performed to assess geometric image fidelity in the presence of CIEDs. Results: CIEDs introduced banding artifacts partially obscuring cardiac structures in bSSFP acquisitions. In contrast, the T1${\rm T}_{1}$‐GRE was more robust to CIED‐induced artifacts at the expense of a lower signal‐to‐noise ratio. In presence of an ICD, image‐based cardiorespiratory motion estimation was possible for 85% (100%) of the volunteers using the bSSFP (T1${\rm T}_{1}$‐GRE) sequence. The in‐plane 2D root‐mean‐squared deviation (RMSD) range between GDC‐derived landmarks and manual annotations using the bSSFP (T1‐GRE) sequence was 3.1–3.3 (3.3–4.1) mm without ICD and 4.6–4.6 (3.2–3.3) mm with ICD. Without ICD, the RMSD between the GP‐predictions and GDC‐derived landmarks ranged between 0.9 and 2.2 mm (1.3–3.0 mm) for the bSSFP (T1‐GRE) sequence. With ICD, the RMSD between the GP‐predictions and GDC‐derived landmarks ranged between 1.3 and 2.2 mm (1.2–3.2 mm) using the bSSFP (T1‐GRE) sequence resulting in an RMSD‐increase of 42%–143% (bSSFP) and −61%–142% (T1‐GRE). Lead‐induced spatial distortions ranged between −0.2 and 0.2 mm (−0.7–1.2 mm) using the bSSFP (T1${\rm T}_{1}$‐GRE) sequence. The 98th percentile range of the spatial distortions in the gross target volume of the patient was between 0.0 and 0.4 mm (0.0–1.8 mm) when using bSSFP (T1${\rm T}_{1}$‐GRE). Conclusions: Tailored bSSFP and T1${\rm T}_{1}$‐GRE sequences can facilitate real‐time cardiorespiratory estimation using GP trained with GDC‐derived landmarks in the majority of landmark locations in the LV despite the presence of CIEDs. The need for high temporal resolution noticeably reduced achievable spatial resolution of the cine MRIs. However, the effect of the CIED‐induced artifacts is device, patient and sequence dependent and requires specific assessment per case. [ABSTRACT FROM AUTHOR]

Published
2025
Full Text
View/download PDF

20. Bringing online adaptive radiotherapy to a standard C-arm linac

Author

Groot Koerkamp, Maureen L., primary, Bol, Gijsbert H., additional, Kroon, Petra S., additional, Krikke, Lean L., additional, Harderwijk, Tessa, additional, Zoetelief, Annelies J., additional, Scheeren, Annick, additional, van der Vegt, Stefan, additional, Plat, Annika, additional, Hes, Jochem, additional, van Gasteren, Ineke B.A., additional, Renders, Esmee R.T., additional, Rutgers, Reijer H.A., additional, Kok, Saskia W., additional, van Kaam, Joost, additional, Schimmel-de Kogel, Geja J., additional, Sikkes, Gonda G., additional, Winkel, Dennis, additional, van Rijssel, Michael J., additional, Wopereis, André J.M., additional, Ishakoglu, Kübra, additional, Noteboom, Juus L., additional, van der Voort van Zyp, Jochem R.N., additional, Beck, Naomi, additional, Soeterik, Timo F.W., additional, van de Pol, Sandrine M.G., additional, Eppinga, Wietse S.C., additional, van Es, Corine A., additional, and Raaymakers, Bas W., additional

Published
2024
Full Text
View/download PDF

26. Target coverage and dose criteria based evaluation of the first clinical 1.5T MR-linac SBRT treatments of lymph node oligometastases compared with conventional CBCT-linac treatment

Author

Winkel, Dennis, Bol, Gijsbert H., Werensteijn-Honingh, Anita M., Intven, Martijn P.W., Eppinga, Wietse S.C., Hes, Jochem, Snoeren, Louk M.W., Sikkes, Gonda G., Gadellaa-van Hooijdonk, Christa G.M., Raaymakers, Bas W., Jürgenliemk-Schulz, Ina M., and Kroon, Petra S.

Published
2020
Full Text
View/download PDF

28. Investigating the use of comprehensive motion monitoring for intrafraction 3D drift assessment of hypofractionated prostate cancer patients on a 1.5T magnetic resonance imaging radiotherapy system

Author

Cancer, Experimentele klinische fysica, Klinische Fysica RT, Radiotherapie, Tsekas, Georgios, Zachiu, Cornel, Bol, Gijsbert H., van den Dobbelsteen, Madelon, Meijers, Lieke T.C., van Lier, Astrid L.H.M.W., de Boer, Johannes C.J., Raaymakers, Bas W., Cancer, Experimentele klinische fysica, Klinische Fysica RT, Radiotherapie, Tsekas, Georgios, Zachiu, Cornel, Bol, Gijsbert H., van den Dobbelsteen, Madelon, Meijers, Lieke T.C., van Lier, Astrid L.H.M.W., de Boer, Johannes C.J., and Raaymakers, Bas W.

Published
2024

29. Generalized div-curl based regularization for physically constrained deformable image registration

Author

Radiotherapie, Experimentele klinische fysica, Cancer, Divisie Beeld & Oncologie, Researchgr. Beeldg. Moleculaire Interv., Klinische Fysica RT, Tzitzimpasis, Paris, Ries, Mario, Raaymakers, Bas W., Zachiu, Cornel, Radiotherapie, Experimentele klinische fysica, Cancer, Divisie Beeld & Oncologie, Researchgr. Beeldg. Moleculaire Interv., Klinische Fysica RT, Tzitzimpasis, Paris, Ries, Mario, Raaymakers, Bas W., and Zachiu, Cornel

Published
2024

30. Bringing online adaptive radiotherapy to a standard C-arm linac

Author

Radiotherapie, Experimentele klinische fysica, Cancer, Klinische Fysica RT, MS Radiotherapie, Arts-assistenten Radiotherapie, Groot Koerkamp, Maureen L., Bol, Gijsbert H., Kroon, Petra S., Krikke, Lean L., Harderwijk, Tessa, Zoetelief, Annelies J., Scheeren, Annick, van der Vegt, Stefan, Plat, Annika, Hes, Jochem, van Gasteren, Ineke B.A., Renders, Esmee R.T., Rutgers, Reijer H.A., Kok, Saskia W., van Kaam, Joost, Schimmel-de Kogel, Geja J., Sikkes, Gonda G., Winkel, Dennis, van Rijssel, Michael J., Wopereis, André J.M., Ishakoglu, Kübra, Noteboom, Juus L., van der Voort van Zyp, Jochem R.N., Beck, Naomi, Soeterik, Timo F.W., van de Pol, Sandrine M.G., Eppinga, Wietse S.C., van Es, Corine A., Raaymakers, Bas W., Radiotherapie, Experimentele klinische fysica, Cancer, Klinische Fysica RT, MS Radiotherapie, Arts-assistenten Radiotherapie, Groot Koerkamp, Maureen L., Bol, Gijsbert H., Kroon, Petra S., Krikke, Lean L., Harderwijk, Tessa, Zoetelief, Annelies J., Scheeren, Annick, van der Vegt, Stefan, Plat, Annika, Hes, Jochem, van Gasteren, Ineke B.A., Renders, Esmee R.T., Rutgers, Reijer H.A., Kok, Saskia W., van Kaam, Joost, Schimmel-de Kogel, Geja J., Sikkes, Gonda G., Winkel, Dennis, van Rijssel, Michael J., Wopereis, André J.M., Ishakoglu, Kübra, Noteboom, Juus L., van der Voort van Zyp, Jochem R.N., Beck, Naomi, Soeterik, Timo F.W., van de Pol, Sandrine M.G., Eppinga, Wietse S.C., van Es, Corine A., and Raaymakers, Bas W.

Published
2024

31. On Patient Experience and Anxiety During Treatment With Magnetic Resonance–Guided Radiation Therapy

Author

Trialbureau Beeld, Klinische Fysica RT, Cancer, Experimentele klinische fysica, Circulatory Health, Westerhoff, Jasmijn M., Borman, Pim T.S., Rutgers, Reijer H.A., Raaymakers, Bas W., Winchester, Neil, Verkooijen, Helena M., Fast, Martin F., Trialbureau Beeld, Klinische Fysica RT, Cancer, Experimentele klinische fysica, Circulatory Health, Westerhoff, Jasmijn M., Borman, Pim T.S., Rutgers, Reijer H.A., Raaymakers, Bas W., Winchester, Neil, Verkooijen, Helena M., and Fast, Martin F.

Published
2024

32. Treatment planning evaluation and experimental validation of the magnetic resonance-based intrafraction drift correction

Author

Radiotherapie, Experimentele klinische fysica, Cancer, Klinische Fysica RT, van den Dobbelsteen, Madelon, Hackett, Sara L., van Asselen, Bram, Oolbekkink, Stijn, Raaymakers, Bas W., de Boer, Johannes C.J., Radiotherapie, Experimentele klinische fysica, Cancer, Klinische Fysica RT, van den Dobbelsteen, Madelon, Hackett, Sara L., van Asselen, Bram, Oolbekkink, Stijn, Raaymakers, Bas W., and de Boer, Johannes C.J.

Published
2024

33. Experimental demonstration of real-time cardiac physiology-based radiotherapy gating for improved cardiac radioablation on an MR-linac

Author

Cancer, Experimentele klinische fysica, Klinische Fysica RT, Computational Imaging, Circulatory Health, Akdag, Osman, Borman, Pim T S, Mandija, Stefano, Woodhead, Peter L, Uijtewaal, Prescilla, Raaymakers, Bas W, Fast, Martin F, Cancer, Experimentele klinische fysica, Klinische Fysica RT, Computational Imaging, Circulatory Health, Akdag, Osman, Borman, Pim T S, Mandija, Stefano, Woodhead, Peter L, Uijtewaal, Prescilla, Raaymakers, Bas W, and Fast, Martin F

Published
2024

34. Solid: a novel similarity metric for mono-modal and multi-modal deformable image registration

Author

Experimentele klinische fysica, Cancer, Klinische Fysica RT, Researchgr. Beeldg. Moleculaire Interv., Tzitzimpasis, Paris, Zachiu, Cornel, Raaymakers, Bas W, Ries, Mario G, Experimentele klinische fysica, Cancer, Klinische Fysica RT, Researchgr. Beeldg. Moleculaire Interv., Tzitzimpasis, Paris, Zachiu, Cornel, Raaymakers, Bas W, and Ries, Mario G

Published
2024

35. MRI-Guided Radiation Therapy Systems

Author

Radiotherapie, Experimentele klinische fysica, Cancer, Low, Daniel A., Fallone, B. Gino, Raaymakers, Bas W., Radiotherapie, Experimentele klinische fysica, Cancer, Low, Daniel A., Fallone, B. Gino, and Raaymakers, Bas W.

Published
2024

36. Influence of magnetic field on a novel scintillation dosimeter in a 1.5 T MR-linac

Author

Cancer, Experimentele klinische fysica, Klinische Fysica RT, Oolbekkink, Stijn, van Asselen, Bram, Woodings, Simon J, Wolthaus, Jochem W H, de Vries, J H Wilfred, van Appeldoorn, Adriaan A, Feijoo, Marcos, van den Dobbelsteen, Madelon, Raaymakers, Bas W, Cancer, Experimentele klinische fysica, Klinische Fysica RT, Oolbekkink, Stijn, van Asselen, Bram, Woodings, Simon J, Wolthaus, Jochem W H, de Vries, J H Wilfred, van Appeldoorn, Adriaan A, Feijoo, Marcos, van den Dobbelsteen, Madelon, and Raaymakers, Bas W

Published
2024

38. Individual lymph nodes: “See it and Zap it”

Author

Winkel, Dennis, Werensteijn-Honingh, Anita M., Kroon, Petra S., Eppinga, Wietse S.C., Bol, Gijsbert H., Intven, Martijn P.W., de Boer, Hans C.J., Snoeren, Louk M.W., Hes, Jochem, Raaymakers, Bas W., and Jürgenliemk-Schulz, Ina M.

Published
2019
Full Text
View/download PDF

39. Adaptive radiotherapy: The Elekta Unity MR-linac concept

Author

Winkel, Dennis, Bol, Gijsbert H., Kroon, Petra S., van Asselen, Bram, Hackett, Sara S., Werensteijn-Honingh, Anita M., Intven, Martijn P.W., Eppinga, Wietse S.C., Tijssen, Rob H.N., Kerkmeijer, Linda G.W., de Boer, Hans C.J., Mook, Stella, Meijer, Gert J., Hes, Jochem, Willemsen-Bosman, Mirjam, de Groot-van Breugel, Eline N., Jürgenliemk-Schulz, Ina M., and Raaymakers, Bas W.

Published
2019
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results