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目的检测AT1123型Χ-γ射线剂量检测仪的终值响应时间,评估其对医用诊断X射线摄影机房放射防护检测的适用性。方法医用诊断X射线摄影机在固定的管电压和管电流,曝光时间从10 ms递增至1000 ms,用AT1123型Χ-γ射线剂量检测仪测量不同曝光时间所对应的剂量率读数,当剂量率读数达到稳定最大值所需要的最短时间为该剂量检测仪的终值响应时间。结果 AT1123型Χ-γ射线剂量检测仪在4种辐射强度的X射线中,曝光时间为100 ms时,均能显示终值的93%以上;曝光时间为250 ms时,可以完全显示终值。结论 AT1123型Χ-γ射线剂量检测仪终值响应时间约为200~250 ms,适合应用于医用诊断X射线摄影机房的放射防护检测。
Objective To detect the final response time of AT1123 X-ray dose detector and evaluate its applicability to radiological testing in medical diagnostic X-ray room. Methods The medical diagnostic X-ray camera at a fixed tube voltage and tube current, the exposure time was increased from 10 ms to 1000 ms, using the AT1123 X-ray dose detector dose rate readings corresponding to different exposure times, when the dose rate readings The minimum time required to reach a stable maximum is the final response time of the dose detector. Results The AT1123 X-ray dose detector can show more than 93% of the final value of the X-ray with four radiation intensities at a exposure time of 100 ms. When the exposure time is 250 ms, the final value can be fully displayed. Conclusion The final response time of AT1123 X-ray dose detector is about 200 ~ 250 ms, which is suitable for the radiological testing of medical diagnostic X-ray room.