Performance of a cylindrical diode array for use in a 1.5 T MR-linac

被引：43
作者：
Houweling, A. C. [1 ]
de Vries, J. H. W. [2 ]
Wolthaus, J. [2 ]
Woodings, S. [2 ]
Kok, J. G. M. [2 ]
van Asselen, B. [2 ]
Smit, K. [2 ]
Bel, A. [1 ]
Lagendijk, J. J. W. [2 ]
Raaymakers, B. W. [2 ]
机构：
[1] Acad Med Ctr, Dept Radiat Oncol, Meibergdreef 9, NL-1105 AZ Amsterdam, Netherlands
[2] Univ Med Ctr Utrecht, Dept Radiat Oncol, Heidelberglaan 100, NL-3584 CX Utrecht, Netherlands
来源：
PHYSICS IN MEDICINE AND BIOLOGY | 2016年 / 61卷 / 03期
关键词：
radiotherapy; MR-linac; ArcCHECK-MR; MRI-accelerator; ArcCHECK; plan verification; patient specific QA; MAGNETIC-FIELD; DOSIMETRY;
D O I：
10.1088/0031-9155/61/3/N80
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
At the UMC Utrecht, a linear accelerator with integrated magnetic resonance imaging (MRI) has been developed, the MR-linac. Patient-specific quality assurance (QA) of treatment plans for MRI-based image guided radiotherapy requires QA equipment compatible with this 1.5 T magnetic field. The purpose of this study was to examine the performance characteristics of the ArcCHECK-MR in a transverse 1.5 T magnetic field. To this end, the short-term reproducibility, dose linearity, dose rate dependence, field size dependence, dose per pulse dependence and inter-diode dose response variation of the ArcCHECK-MR diode array were evaluated on a conventional linac and on the MR-linac. The ArcCHECK-MR diode array performed well for all tests on both linacs, no significant differences in performance characteristics were observed. Differences in the maximum dose deviations between both linacs were less than 1.5%. Therefore, we conclude that the ArcCHECK-MR can be used in a transverse 1.5 T magnetic field.
引用
收藏
页码：N80 / N89
页数：10
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