|
|
|
| Comparison and evaluation of dose at reference point between the displayed value and measured value of interventional radiology equipment |
| XU Hui, YUE Baorong, ZHAO Xipeng, SUN Quanfu |
| National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC. Beijing 100088 China |
|
|
|
|
Abstract Objective By measuring the relationship between the reference point dose and the display dose of interventional radiology equipment in fluoroscopy mode, the accuracy of the display dose of equipment was verified, and the rationality of using the display reference point dose to guide physicians to optimize radiation protection was evaluated.Methods Two different brands of flat panel detectors for interventional radiology equipment were selected and recorded as device A and Device B respectively. A 30 cm×30 cm and 20 cm thick PMMA phantom and copper plates of different thickness were combined and placed on one side of the plate detector. The RF detector of unfors Xi dosimeter was used to measure the dose rate at the reference point position, and compare the incident dose at the reference point with the displayed value. Different thickness phantom were used to measure the dose rates of the interventional reference points, and the relationship between the output per mA·min and kV was fitted.Results For device A, the deviation between the dose rate displayed and the measured dose rate in the field was within 6%. For device B, the deviation between the dose rate displayed and the measured dose rate in the field reached 85.6% or more. The output of each mA·min of the device has a power exponential relation with kV.Conclusion Medical technicians in interventional radiology should be aware of the accuracy of the reference dose displayed by their X-ray systems for interventional radiology, and periodically verify and control the quality of the interventional radiology equipment to ensure the accuracy and referability of the displayed dose. Interventional physicians and technicians can use the displayed dose to roughly estimate the level of the exposed dose on the patient's body surface to avoid the patient's deterministic effect.
|
|
Received: 01 June 2020
|
|
|
|
|
|
[1] Toossi M T, Mehrpouyan M, Nademi H, et al. Preliminary results of an attempt to predict over apron occupational exposure of cardiologists from cardiac fluoroscopy procedures based on DAP (dose area product) values[J]. Australas Phys Eng Sci Med, 2015, 38(1): 83-91
[2] 徐辉, 王建超, 黄卓, 等. 介入放射学中辅助防护设施改进效果评价研究[J]. 中国辐射卫生,2017,26(6):661-664
[3] Chida K, Saito H, Zuguchi M, et al. Does digital acquisition reduce patients' skin dose in cardiac interventional procedures? An experimental study[J]. AJR Am J Roentgenol, 2004, 183(4): 1111-1114
[4] Tsapaki V, Ahmed N A, AlSuwaidi J S, et al. Radiation exposure to patients during interventional procedures in 20 countries: initial IAEA project results[J]. AJR Am J Roentgenol, 2009, 193(2): 559-569
[5] Balter S, Hopewell JW, Miller DL, et al. Fluoroscopically guided interventional procedures: a review of radiation effects on patients’skin and hair[J]. Radiology 2010; 254(2): 326-341.
[6] International Commission on Radiological Protection. ICRP publication 85: avoidance of radiation injuries from medical interventional procedures[S]. Ann ICRP 2001 (30/2: Publication 85).
[7] 徐辉, 薛娴, 赵红枫, 等. 用胶片法对心脏介入程序中患者峰值皮肤剂量测量研究[J]. 中华放射医学与防护杂志,2014(4):302-305
[8] International Electrotechnical Commission (IEC). Medical electrical equipment. Part 2–43. Particular requirements for the safety of X-ray equipment for interventional procedures[J]. IEC 60601-2-43. Geneva, Switzerland: International Electrotechnical Commission; 2000.
[9] Wong L, Rehm J. Images in clinical medicine: radiation injury from a fluoroscopic procedure[J]. N Engl J Med. 2004, 350: e23.
[10] NCRP, 2010. Radiation Dose Management for Fluoroscopically Guided Interventional MedicalProcedures[S]. NCRP Report No. 168. National Council on Radiation Protection and Measurements, Bethesda, MD.
[11] 中国国家标准化管理委员会. GB 9706.23—2005 医用电气设备第2-43部分: 介入操作X射线设备安全专用要求[S]. 北京: 中国标准出版社, 2005.
[12] International Electrotechnical Commission (IEC). Medical electrical equipment-Part 2-54: Particular requirements for the basic safety and essential performance of X-ray equipment for radiography and radioscopy[J]. Geneva, Switzerland: International Electrotechnical Commission, 2009.
[13] Chida K, Inaba Y, Morishima Y, et al. Comparison of dose at an interventional reference point between the displayed estimated value and measured value[J]. Radiological Physics& Technology, 2011
[14] Tanabe N, Sekiguchi H, Tsukamoto A, et al. Multicenter Survey of the Display Air Kerma and Actual Measured Values in IVR X-ray Apparatus[J]. Japanese Journal of Radiological Technology, 2019
[15] 中华人民共和国国家卫生健康委员会. GBZ 130—2020放射诊断放射防护要求[S]. 北京: 中国标准出版社, 2020.
[16] 中华人民共和国国家卫生健康委员会. WS 76—2020 医用X射线诊断设备质量控制检测规范[S]. 北京: 中国标准出版社, 2020.
[17] Chida K, Takahashi T, Ito D, et al. Clarifying and visualizing sources of staff-received scattered radiation in interventional procedures[J]. Am J Roentgenol, 2011.
[18] 丁海岭, 王永春, 王敏杰, 等. 心血管介入手术中透视时间作为辐射剂量警示指标的可行性研究[J]. 中华放射医学与防护杂志,2020,40(3):237-240
[19] Chida K, Saito H, Otani H, et al. Relationship between fluoroscopic time, dose-area product, body weight, and maximum radiation skin dose in cardiac interventional procedures[J]. Am J Roentgenol. 2006, 186: 774–778.
|
|
|
|
