[1]董凤华,张晓栋,董文龙,等.乳腺非介入管电压影响因素研究[J].中国医学物理学杂志,2021,38(11):1325-1332.[doi:DOI:10.3969/j.issn.1005-202X.2021.11.002]
　DONG Fenghua,ZHANG Xiaodong,DONG Wenlong,et al.Factors influencing non-invasive tube voltage measurement for mammography[J].Chinese Journal of Medical Physics,2021,38(11):1325-1332.[doi:DOI:10.3969/j.issn.1005-202X.2021.11.002]
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乳腺非介入管电压影响因素研究()
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《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]

卷:
38卷
期数:
2021年第11期
页码:
1325-1332
栏目:
医学放射物理
出版日期:
2021-11-26

文章信息/Info

Title:
Factors influencing non-invasive tube voltage measurement for mammography
文章编号:
1005-202X（2021）11-1325-08
作者:
董凤华; 张晓栋; 董文龙; 杨建; 范杰
中国测试技术研究院， 四川 成都 610021
Author(s):
DONG Fenghua;  ZHANG Xiaodong;  DONG Wenlong;  YANG Jian;  FAN Jie
National Institute of Measurement and Testing Technology, Chengdu 610021, China
关键词:
非介入; 管电压; 乳腺摄影; 过滤; 平均峰值电压; 实用峰值电压
Keywords:
Keywords: non-invasive tube voltage mammography filtration average kilovolt peak practical peak voltage
分类号:
R318
DOI:
DOI:10.3969/j.issn.1005-202X.2021.11.002
文献标志码:
A
摘要:
目的：参照IEC 61676标准，研究随着管电压的增加，距离、过滤条件和阳极角等影响因素在两种乳腺辐射场（Mo/Mo和W/Rh）中的改变引起Fluke X2和RTI piranha 657两类非接入测量仪器测量结果的变化及差异。方法：利用介入法测量确定管电压稳定性，在两种乳腺辐射场情况下改变距离、过滤条件和阳极角进行非介入管电压测量，根据测量结果计算两种辐射场和两类仪器测量结果的变化趋势，并用蒙特卡罗模拟获得两种辐射场条件下因为过滤变化达到仪器的计数比值差异（R值变化率）并分析原因。结果：在W/Rh辐射场下，即使距离和阳极角差异较大、过滤条件发生微小变化，对两类仪器测量结果的影响符合IEC 61676的要求，都在0.5 kV以内；但是在Mo/Mo辐射场下，同样过滤条件变化引起的两类仪器测量结果差异较大，其中Fluke X2测量结果最大变化甚至达到了1.6 kV。结论：当对乳腺非介入管电压测量仪器进行校准时，各个实验室应该考虑确立统一的校准距离、球管阳极角和过滤要求作为重要的参考条件，特别是在Mo/Mo辐射场下对过滤的限制异常重要，以减少对非介入管电压平均峰值电压测量结果的影响，保证各个校准实验室间结果的一致性，提高可比性；建议进行乳腺非介入管电压测量的时候尽量不使用平均峰值电压来反应测量结果，而应使用实用峰值电压。
Abstract:
Abstract: Objective To study the variations and differences of Fluke X2 and RTI piranha 657 measurement results caused by the changes of distance, filtering conditions and anode angle in two kinds of radiation fields (Mo/Mo and W/Rh) with the increase of tube voltage according to IEC 61676 standard. Methods The stability of tube voltage was determined by an intrusive method. The distance, filtering conditions and anode angle were changed for the non-invasive measurement of tube voltage in two kinds of radiation fields. According to the measurement results, the change trends of the measurement results obtained by two kinds of instruments in two kinds of radiation fields were calculated, and the counting ratio difference (change rate of R value) of the instrument due to the filtering conditions change in two kinds of radiation fields was obtained by Monte Carlo simulation. Results In W/Rh radiation field, even if distance and anode angle differed greatly and filtering conditions changed slightly, their effects on the measurement results of two kinds of instruments met the requirements of IEC 61676 and were within 0.5 kV. However, in Mo/Mo radiation field, the measurement difference of the two kinds of instruments caused by the same filtering conditions changes was relatively larger, especially the maximum change of Fluke X2 measurement results which even reached 1.6 kV. Conclusion When calibrating the non-invasive tube voltage measuring instrument, a unified calibration distance, the anode angle of the bulb tube and the filtering conditions should be considered as important reference conditions in each laboratory, especially the limitation of filtering is extremely important in Mo/Mo radiation field, so as to reduce the effect on the non-invasive measurement of the average kilovolt peak of tube voltage, ensure the consistency of the results among the calibration laboratories, improving comparability. It is suggested that in the non-invasive tube voltage measurement for mammography, practical peak voltage instead of average kilovolt peak should be used to reflect the measurement results.

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[1]时飞跃,柏正璐,秦伟. 西门子CT模拟机水的CT值、图像噪声和管电压长期稳定性分析[J].中国医学物理学杂志,2017,34(12):1232.[doi:DOI:10.3969/j.issn.1005-202X.2017.12.008]
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[4]董凤华,张晓栋,董文龙,等.乳腺非介入管电压影响因素研究[J].中国医学物理学杂志,2021,38(10):1325.
　DONG Fenghua,ZHANG Xiaodong,DONG Wenlong,et al.Factors influencing non-invasive tube voltage measurement for mammography[J].Chinese Journal of Medical Physics,2021,38(11):1325.

备注/Memo

备注/Memo:
【收稿日期】2021-06-05 【基金项目】国家计量技术法规项目（计量2019-42号） 【作者简介】董凤华，工程师，从事医学计量及辐射剂量工作，E-mail: Dongfenghua86@126.com 【通信作者】范杰，副研究员，主要从事辐射剂量工作，E-mail: fjfj_2021@163.com
更新日期/Last Update: 2021-11-26