摘要
目的探讨低管电压CTA在降低下肢动脉闭塞性疾病患者辐射剂量中的价值。方法采用低管电压技术对30例下肢动脉闭塞性疾病患者行CTA检查。对所有数据进行MPR、MIP、CPR等处理。记录每次扫描的容积剂量指数(CTDI vol)和剂量长度乘积(DLP),并计算有效剂量(ED)。回顾性分析30例经常规CTA检查患者的辐射有效剂量,并与低管电压CTA结果进行对照。结果接受低管电压CTA检查患者的平均ED为6.50 mSv,常规CTA检查患者的平均ED为10.51 mSv,两者差异有统计学意义(P<0.05)。结论低管电压CTA对下肢动脉闭塞性疾病的显示效果较好,且辐射剂量明显降低。
Objective To explore the value of arterial occlusive disease（ASO） in lower extremities CT angiography（CTA） using low tube voltage setting in reducing radiation dose.Methods CTA using low tube voltage setting were performed in 30 patients with ASO.MPR、MIP、CPR,etc were used in the post processing of all image data.CT dose index（CTDI vol） and dose length product（DLP） were recorded,and the effective dose（ED） was calculated.The radiation dose of other 30 patients underwent conventional CTA were analyzed retrospectively and compared with that of the CTA using low tube voltage setting.Results The average effective dose of the CTA using low tube voltage setting was 6.5mSv,while of conventional CTA was 10.51 mSv（P0.05）.Conclusion The CTA using low tube voltage setting can reduce radiation exposure dose obviously,and keep good CTA image quality.
出处
《黑龙江医学》
2011年第12期892-894,共3页
Heilongjiang Medical Journal
关键词
CT血管成像
管电压
辐射剂量
下肢动脉闭塞性疾病
CT angiography
Tube voltage
Radiation dose
Lower extremity arterial
Occlusive disease
