多种水等效材料的医用电子束修正因子研究

doi:10.3969/j.issn.1000-1158.2024.05.19

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Abstract In view of the measurement and application of the correction factor for water equivalent materials in medical electron beam dose measurement, the experimental values of depth scaling factor (cpl), fluence scaling factor (hpl) and total correction factor (kpl) are obtained by scanning the percentage depth dose (PDD) curve of medical electron beam in water and water-equivalent materials. The results show that the measurement results of water equivalent materials can be converted into absorbed dose to water by the combination of cpl and hpl or only using kpl. Comparing the PDD curves shows that the maximum deviation of R50 of three water-equivalent materials after cpl-hpl correction are 0.19%, 0.28% and 0.22% compared with that measured in water at the electron energy of 10~20MeV. The maximum deviation of R50 obtained by kpl correction are 0.23%, 0.29% and 0.18%, respectively. Conclusion: the experimental data of cpl-hpl and kpl are provided, which is convenient for users to quickly measure the absorbed dose to water of electron beam, and it is simpler and more efficient to use kpl than cpl-hpl.

Key words： ionizing radiation measurement absorbed dose electron beam scaling factor correction factor water-equivalent material

Received: 09 January 2024 Published: 23 May 2024

PACS:

TB98

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	Articles by authors
	YAO Jintao
	LI Yihua
	WANG Kun
	WANG Zhipeng
	JIN Sujun
	WU Han

Cite this article:

YAO Jintao,LI Yihua,WANG Kun, et al. Correction Factors of Medical Electron Beams for Various Water-equivalent Materials[J]. Acta Metrologica Sinica, 2024, 45(5): 747-754.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2024.05.19 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2024/V45/I5/747

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