J
J J W Lagendijk
Researcher at Utrecht University
Publications - 59
Citations - 1016
J J W Lagendijk is an academic researcher from Utrecht University. The author has contributed to research in topics: Dosimetry & Image processing. The author has an hindex of 17, co-authored 59 publications receiving 852 citations. Previous affiliations of J J W Lagendijk include Elekta & École Polytechnique de Montréal.
Papers
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Journal ArticleDOI
Design of a radiative surface coil array element at 7 T: the single-side adapted dipole antenna.
Alexander J.E. Raaijmakers,Özlem Ipek,Dennis W. J. Klomp,Cecilia Possanzini,Paul R. Harvey,J J W Lagendijk,C.A.T. Van den Berg +6 more
TL;DR: This work presents a novel design approach, regarding coil array elements as antennas, which is characterized by comparison with three other, more conventional designs using finite difference time domain (FDTD) simulations and B +1 measurements on a phantom.
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Feasibility of automatic marker detection with an a-Si flat-panel imager
TL;DR: Thanks to the use of an a-Si flat-panel imager, on-line position verification using implanted gold markers becomes clinically feasible and these markers can be automatically detected in portal images obtained with 1-2 MU relative to a stable reference point related to the field boundary.
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Consequences of air around an ionization chamber: Are existing solid phantoms suitable for reference dosimetry on an MR‐linac?
S.L. Hackett,B. Van Asselen,J.W.H. Wolthaus,J G M Kok,S J Woodings,J J W Lagendijk,Bas W. Raaymakers +6 more
TL;DR: The large angular dependence of ion chambers measured in the plastic phantom in a magnetic field appears to arise from a change of air distribution as the chamber is moved within the insert, rather than an intrinsic isotropy of the chamber sensitivity to radiation.
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Prostate intrafraction motion during the preparation and delivery of MR-guided radiotherapy sessions on a 1.5T MR-Linac.
D. De Muinck Keizer,Linda G W Kerkmeijer,T. Willigenburg,A.L.H.M.W. Van Lier,M.D. den Hartogh,J.R.N. Van der Voort van Zyp,E.N. De Groot-van Breugel,Bas W. Raaymakers,J J W Lagendijk,J. de Boer +9 more
TL;DR: This first study to investigate prostate intrafraction motions during entire MR-guided RT sessions on an MR-Linac has shown that high quality 3D cine-MR imaging and prostate tracking during RT is feasible with beam-on and the clinically applied margins of 5 mm have proven to be sufficient for these treatments.
Journal ArticleDOI
Performance of a cylindrical diode array for use in a 1.5 T MR-linac
Antonetta C. Houweling,J.H.W. De Vries,J.W.H. Wolthaus,S J Woodings,J G M Kok,B. Van Asselen,K Smit,Arjan Bel,J J W Lagendijk,Bas W. Raaymakers +9 more
TL;DR: It is concluded that the ArcCHECK-MR can be used in a transverse 1.5 T magnetic field and its short-term reproducibility, dose linearity, dose rate dependence, field size dependence, dose per pulse dependence and inter-diode dose response variation are satisfactory.