Design and Development of a Low-cost Integrated Dosimeter for External Beam Dosimetry in Radiation Oncology

被引:0
作者
Chant, Tim [1 ]
Ramachandran, Prabhakar [1 ]
机构
[1] Princess Alexandra Hosp, Dept Radiat Oncol, Canc Serv, Therapeut Phys, Woolloongabba, Qld, Australia
关键词
Diodes; dosimetry; operational amplifiers; radiation detectors; radiation oncology; QUALITY-ASSURANCE; RADIOTHERAPY; PERFORMANCE;
D O I
10.4103/jmp.jmp_107_23
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Radiation dosimeters play a crucial role in radiation oncology by accurately measuring radiation dose, ensuring precise and safe radiation therapy. This study presents the design and development of a low-cost printed circuit board (PCB) dosimeter and an integrated electrometer with sensitivity optimized for dose rates intended for use in megavoltage radiation therapy. The PCB dosimeter was designed in KiCad, and it uses a low-cost S5MC-13F general-purpose 1 kV 5A power diode as a radiation detector. The dosimeter is calibrated against a known dose derived from an ionization chamber and tested for dose linearity, dose rate dependence, field size dependence, and detector orientation dependence. The observed average dose differences between the delivered and measured doses for most measurements were found to be < 1.1%; the dose rate linearity between 100 MU/min and 1400 MU/min was found to be within 1.3%. This low-cost architecture could successfully be adapted further for a scalable, cost-effective dosimetry solution through firmware or circuit design.
引用
收藏
页码:392 / 397
页数:6
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