Design and research of an improved radiosurgical collimator

Yun ZHOU; Weihai CHEN; Yongbiao LIU; Nan YAN; Xiangshang SUN; Wentao LIAO; Junya LIU; Yuehu PU

doi:10.11889/j.1000-3436.2022-0142

Journals >Journal of Radiation Research and Radiation Processing >Volume 41 >Issue 3 >Page 030304 > Article

Journal of Radiation Research and Radiation Processing
Vol. 41, Issue 3, 030304 (2023)

Design and research of an improved radiosurgical collimator

Yun ZHOU^1、2, Weihai CHEN⁴, Yongbiao LIU^5、6, Nan YAN^1、2, Xiangshang SUN⁷, Wentao LIAO^1、2, Junya LIU^1、2, and Yuehu PU^3、*

Author Affiliations

¹Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

²University of Chinese Academy of Sciences, Beijing 100049, China

³Medical Equipment Innovation Research Center, West China Hospital, Sichuan University, Chengdu 610041, China

⁴(Techtron information technology (Shanghai) Co., Ltd., Shanghai 200233, China)

⁵Nanjing Maicong Medical Technology Co., Ltd., Nanjing 210023, China

⁶Department of Radiation Physics and Technology, Jiangsu Province Hospital, Nanjing 210029, China

⁷Department of Radiation Physics and Technology, Hunan Cancer Hospital, Changsha 410013, China

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DOI: 10.11889/j.1000-3436.2022-0142 Cite this Article

Yun ZHOU, Weihai CHEN, Yongbiao LIU, Nan YAN, Xiangshang SUN, Wentao LIAO, Junya LIU, Yuehu PU. Design and research of an improved radiosurgical collimator[J]. Journal of Radiation Research and Radiation Processing, 2023, 41(3): 030304 Copy Citation Text

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Abstract

In this paper, a new collimator based on Hygeia GMX-1 cobalt (⁶⁰Co) radiosurgery system was designed and analyzed using the Monte Carlo simulation program GEANT4. The results of EBT3 film measurements showed that the field penumbra of the improved collimator was reduced by 17.6% and the absorbed dose rate was 2.12 times higher, while the source activity, source axis distance and field size remained unchanged. The collimator has significant advantages in the two key technical parameters of absorbed dose rate and penumbra.

Keywords

Collimator Dose rate Penumbra Radiotherapy

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