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双源CT大螺距模式主动脉成像的可行性研究 预览 被引量:1

Feasibility study of dual-source CT high-pitch aorta angiography
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摘要 目的:利用双源CT的大螺距模式对主动脉全程扫描成像,对照评价其图像质量和有效辐射剂量,旨在研究双源CT大螺距模式行主动脉全程扫描的可行性。方法:将接受主动脉CT血管造影(CTA)的患者随机分为A、B两组,A组62例,B组58例。A组使用大螺距扫描模式,B组使用常规扫描模式;图像质量评价分客观和主观两种方法,客观评价包括图像噪声及信噪比,主观评价由2名放射科医生独立完成。辐射剂量统计使用设备自带的数据记录。结果:大螺距模式主观图像质量评分(2.66±0.51)较常规扫描组(2.14±0.47)高,差异有统计学意义(Z=-5.29,P〈0.01);客观图像质量无明显差异;扫描时间大螺距模式组(1.61±0.23)s,比常规扫描组(6.52±1.41)s缩短,差异有统计学意义(t=-27.041,P〈0.01);大螺距组有效辐射剂量(3.97±1.07)m Sv,对比常规扫描组(15.18±2.58)m Sv,差异有统计学意义(t=-20.22,P〈0.01)。结论:大螺距模式主动脉全程扫描图像质量可以满足主动脉病变的诊断,具有扫描时间短、辐射剂量低及运动伪影少等优势,可替代主动脉检查常规扫描模式。 Objective: To investigate the feasibility, image quality and radiation dose for high-pitch dual-source CT angiography (CTA) of the whole aorta. Methods: Each group of 62 and 58 patients underwent CTA either on dual-source CT device with high-pitch mode with a pitch of 3.2(group A) or conventional single-source (group B). Evaluate the image quality and radiation dose. Image quality of the aorta was independently assessed by two readers. Scanner-reported dose-length product values were used to estimate effective dose values. Results:Subjective scoring of image quality were significantly increased in the high-pitch examination protocol (2.66±0.51 vs.2.14±0.47, P〈0.01) for groups A and B. Objective scoring of image quality were not significantly different. The imaging length was not significantly different, but the imaging time was significantly shorter in the high-pitch group (1.61±0.23 vs.6.52±1.41s P〈0.01) for groups A and B. Radiation dose was lower. (3.97±1.07 mSv vs. 15.18±2.58 mSv, P〈0.01). Conclusion:High-pitch dual-source CT angiography of the whole aorta is feasible in unselected patients. As a significant advantage over regular pitch protocols, shorter scan time, lower radiation dose and less motion artifacts is possible. this CT mode bears potential to become a standard CT protocol.
作者 王利军 孙凯 王志琴 董馨 贾海亮 杜晓辉 张皓成 WANG Li-jun, SUN Kai, WANG Zhi-qin, et al(CT Room, Medical Imaging Center, Baotou City Center Hospital, Inner Mongolia Province, Baotou 014040, China.)
出处 《中国医学装备》 2014年第12期4-7,共4页 China Medical Equipment
基金 内蒙古自治区医疗卫生科研计划(201302124)“第二代双源CT双能量心肌灌注成像评价心肌缺血的实验与临床研究”
关键词 大螺距 双源CT CT血管造影 主动脉 辐射剂量 High-pitch Dual-source CT CT Angiography Aorta Radiation dose
作者简介 王利军,男,(1969~).本科学历,副主任医师。包头市中心医院影像中心CT室,从事心脑血管及胸部病变诊断工作 通讯作者:Henrysk@163.com
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参考文献10

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