医用血管造影X射线机剂量影响因素及图像质量的分析  

Medical X-ray angiography equipment dose influencing factors and image quality analysis

作　　者：肖亚辉 Xiao Yahui(Siemens(Shenzhen)Magnetic Resonance Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]西门子(深圳)磁共振有限公司,深圳518000

出　　处：《现代仪器与医疗》2024年第6期87-92,共6页Modern Instruments & Medical Treatment

摘　　要：目的探讨不同水平的X光照射野,附加铜滤过,目标到图像接收器距离(Object to Image Receptor Distance,OID)和帧率对医用血管造影X射线机入射面剂量和图像质量的影响,为临床实践合理选取这些因素提供指导性建议。方法使用体模模拟受照患者,分别选取不同水平的X光照射野(20cm,32cm,49cm),附加铜滤过(0.1mm,0.3mm,0.6mm),OID(30cm,45cm,60cm)和帧率(7.5p/s,15p/s,30p/s),比较体模入射面剂量率的测量值和获取的图像质量。结果不同X光照射野水平体模入射面剂量率和图像质量评分比较,差异有统计学意义(P<0.05)。不同附加铜滤过水平体模入射面剂量率比较,差异有统计学意义(P<0.05)。3种不同附加铜滤过水平的图像质量评分比较,差异无统计学意义(P>0.05)。不同OID水平体模入射面剂量率比较,差异有统计学意义(P<0.05)。3种不同OID水平的图像质量评分比较,差异无统计学意义(P>0.05)。不同帧率水平体模入射面剂量率比较,差异有统计学意义(P<0.05)。3种不同帧率水平的图像质量评分比较,差异无统计学意义(P>0.05)。结论入射面剂量呈现出X光照射野20cm时大于照射野32cm和49cm时,附加铜滤过0.1mm时大于附加铜滤过0.3mm和0.6mm时,OID 60cm时大于OID 30cm和OID 45cm时,帧率30p/s时大于帧率15p/s和7.5p/s时;图像质量呈现出X光照射野20cm时优于49cm时,其他因素水平的图像质量无明显差异。Objective To investigate the effects of different X-ray fields,additional copper filtration,distance between the patient and the image receptor(object-image distance,OID)and frame rate on the incident dose and image quality of medical X-ray angiography equipment,and analyze the statistical differences between dose and image quality,so as to provide guiding suggestions for the reasonable selection of factors in clinical practice.Methods The phantom was used to simulate the irradiated patients,and different X-ray fields(20cm,32cm,49cm),added copper filtration(0.1 mm,0.3 mm,0.6 mm),OID(30cm,45cm,60cm)and frame rate(7.5p/s,15p/s,30p/s)were selected,and the measured patient incident dose rate and the image quality of the acquired images were compared.Results There was a statistically significant difference in the dose rate at the irradiation surface of the different X-ray field level phantoms(P<0.05).There was a statistically significant difference in the dose rate at the irradiation surface of the different additional copper filtration level phantoms(P<0.05).There was no statistically significant difference in the image quality score among the three different additional copper filtration levels(P>0.05).There was a statistically significant difference in the dose rate at the irradiation surface of the different OID level phantoms(P<0.05).There was no statistically significant difference in the image quality score among the three different OID levels(P>0.05).There was a statistically significant difference in the dose rate at the irradiation surface of the different frame rate level phantoms(P<0.05).There was no statistically significant difference in the image quality score among the three different frame rate levels(P>0.05).Conclusions The incidence dose showed that 20cm X-ray field was greater than X-ray fields of 32cm and 49cm,0.1mm added copper filter was greater than added copper filters of 0.3mm and 0.6mm,60cm OID was greater than OID of 30cm and 45cm,30p/s frame rate was greater than frame rate of 15p/s and 7.5

关 键 词：X射线设备 附加铜滤过 帧率 剂量率 图像质量 

分 类 号：TH77[机械工程—仪器科学与技术] R814.5[机械工程—精密仪器及机械]