目的:探讨使用辐射防护仪进行测量时响应时间和时间因子对测量结果的影响,评价3台辐射防护仪测量结果的差异.方法:在直接数字化X射线摄影系统(DR)的不同出束时间下,对不同3台辐射防护仪的剂量率读数进行比较,分析经时间因子修正前、后测量结果的差异.结果:在DR的出束时间小于辐射防护仪的响应时间时,经时间因子修正前、后的剂量率读数有显著性差异;相同的出束时间下,响应时间一致的两种辐射防护仪的剂量率读数差异无统计学意义(F=0.406,P＞0.05);响应时间不同的两种辐射防护仪剂量率读数差异有统计学意义(F=7.214,F=5.368;P＜0.05).结论:在辐射测量中,当被测量设备的出束时间小于辐射防护仪的响应时间时,必须使用时间因子对剂量率读数进行修正;在辐射测量中必须合理选用防护仪,必要时须对响应时间不同的辐射防护仪的剂量率读数进行仪器修正.%Objective: To explore the effects of response time and time factor on the measurement results in using radiation protection survey meters to carry out measurement, and to evaluate the difference of measurement results among different radiation protection survey meters. Methods: Through compared the dose-rate readings of different radiation protection survey meters under different bundle time of direct digital radiography (DR) system to analyze the differences of measurement results before and after the correction of time factor. Results: When the bundle time of DR was less than the response time, there was significant difference in the dose rate reading between before and after the correction of time factor. Under the same bundle time, the difference of dose rate reading of two radiation protection survey meters with coincident response time was no significant (F=0.406, P>0.05), while the difference of dose rate reading of two radiation protection survey meters with different response time was significant (F=7.214, F=5.368;P<0.05). Conclusion: In the measurement of radiation, time factor must be used to correct dose rate reading when the bundle time is less than the response time of radiation protection survey meters. It is necessary to reasonably choose radiation protection survey meters in the measurement of radiation, and the dose rate reading of different radiation protection survey meters with different response time should be corrected in necessity.
展开▼
机译：NCRP报告第162号，《辐射安全计划的自我评估：全国辐射防护与测量委员会的建议》，NCRP科学委员会2-4，David S. Myers，主席，2009年，第118页（软封面），50美元.00，美国国家辐射防护与测量委员会，Wood-mont Avenue 7910号，套房400，贝塞斯达，MD 20814-3095; www.ncrppublications.org; ISBN 978-0-9823843-0-5。
