Detection and analysis of protective performance of medical electron linear accelerator based on IEC standard

Objective: According to the IEC 60601-2-1 version 3.1, the protective performance of medical electron linear accelerator is comprehensively analyzed and detected, which will provides reference for the future use of this standard to detect similar equipment. Methods: We carries on the field trials and testing on a 6MV medical electron linear accelerator radiation hazard protection related test items, and carry on the comparative analysis between our result and the standard request. Results: The medical electron linear accelerator equipment and the operation of the safety interlock system testing content were in line with the standard requirements. Relative surface dose was 58.7%. M area on the patient plane X-ray radiation leak maximum rate was 1.34%. The mean value of X, Y measurements at different combinations of diaphragm conditions were 0.21%, 0.26%, respectively. Multi leaf collimator leakage radiation rate maximum was 3.46%. The maximum leakage radiation combination condition of outside the area M for the gantry was 0°, the beam limiting system was 0°, the X-ray radiation leak maximum rate was 0.11%, and average was 0.08%. Outside the patient plane X-ray radiation leak maximum rate was 0.25%, and the maximum value of ambient dose equivalent rate was 0.08 μSv/h. Conclusion: Protection against incorrect absorbed dose in the treatment volume, stray radiation in the radiation field, radiation in the patient plane outside the radiation field and the radiation safety for patients and others of the medical electron linear accelerator can reach the IEC 60601-2-1 standard protection requirements. (authors)