基于JJG(闽)1086-2018放射治疗CT模拟定位机X射线辐射源的质控分析

doi:10.3969/j.issn.1000-1158.2020.06.18

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Abstract The accuracy of the beam ray and the target area together with the accuracy of the patients positioning are more and more important in the emphasis on the accurate radiotherapy. One of the most important aspects is the scanning accuracy of CT and the quality of the images, so the quality control of positioning CT is related to the success of the whole radiotherapy process. The principles and methods of the X-ray radiation source of JJG (Min)1086-2018 X-ray radiation source in the verification and quality control were introduced in detail, and the quality control of the CT simulation machine was quantitatively analyzed from the aspects of the image quality and the machines mechanical precision. The measurement error of CT is less than 30HU, the image uniformity is less than 5.0HU, the resolution is 7Lp/cm, and the low contrast resolution is less than 3.0mm, 5.0mm and 6.0mm at 1.0%, 0.5% and 0.3% respectively, which meets the requirements of the regulations. The image quality and mechanical accuracy of CT simulator are well guaranteed. The dose accuracy, image parameters and position accuracy of CT simulator can be followed regularly.

Key words： metrology CT simulator radiation therapy X-ray radiation source

Received: 13 May 2019 Published: 08 June 2020

PACS:

TB98

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	Articles by authors
	GAO Xiang
	SHI Li-wan
	FU Li-rong
	CHEN Si-jia
	LIU Jun
	HE Yi-peng
	CHEN Si-jia

Cite this article:

GAO Xiang,SHI Li-wan,FU Li-rong, et al. Study on the Quality Control for Computed-tomography Simulators Based on JJG1086-2018[J]. Acta Metrologica Sinica, 2020, 41(6): 743-747.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2020.06.18 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2020/V41/I6/743

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