Study on influencing factors of typical value of entrance surface air #br#
kerma rate of subject by routine medical Xray machine in Fuzhou City#br#
WANG Xintao, ZHENG Senxing, LIN Yan, LIU Xiangquan，SHI Wenhua，SU Danhua，LIU Weng，et al.
Abstract：Abstract: ObjectiveTo investigate the influencing factors of typical value of entrance surface air kerma rate for routine medical radioscopy in Fuzhou City. MethodsAccording to “Specifications for testing of image quality control of medical Xray machine”(WS 762011), the level of typical values of entrance surface air kerma rate of the subjects by radioscopy were detected and the influence factors were investigated. ResultsTotally 87 radioscopy machines were investigated and 22 disqualification(25.3%, the typical value of entrance surface air kerma rate＞25 mGy/min), and 17 machines administrated by Fuzhou Health Bureau were intervened, resulting in the typical value were≤25 mGy/min, in which five machines were repaired by hand regulation with “high voltage, low current, thick filter”, five machines by using disassembly and maintenance. In addition, four machines were stopped to work and three machines will be replaced. ConclusionThe quality control of Xray machine and the examination technique of the doctors are main influence factors for typical value of entrance surface air kerma rate of medical radioscopy.
2018, Vol. 24 
