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Received:August 04, 2018 Published Online:March 22, 2019
Received:August 04, 2018 Published Online:March 22, 2019
中文摘要: 目的 分析探讨64排与256排螺旋CT在诊断老年肺栓塞(PE)的价值。方法 收集2016年1月至2018年6月收治的66例老年PE的患者。按照随机数表法平均分为两组各33例。观察组使用GE公司Revolution 256排CT进行扫描,对照组使用美国GE-lightspeed 64排(128层)螺旋CT进行扫描。观察指标包括肺动脉主干、左肺动脉、右肺动脉、胸大肌的动态检测CT值,测量的背景噪声(BN)为主动脉噪声值。根据计算公式计算信号噪声比(SNR)、对比度噪声比(CNR)。同时比较检查时间、造影剂使用剂量。结果 观察组与对照组的观察指标结果显示,肺动脉干CT值、左肺动脉CT值、右肺动脉CT值、胸大肌CT值、BN、SNR、CNR两组比较,差异均没有统计学意义(P>0.05)。256排螺旋CT诊断老年肺栓塞在检查时间[(3.29±1.24)s vs(7.56±1.07)s]和造影剂剂量[(4.77±1.38) mSv vs(5.86±0.94) mSv]使用上均少于64排螺旋CT,差异有统计学意义(P<0.01)。结论 64排与256排螺旋CT都能够很好的诊断PE,但256排螺旋CT缩短了检查时间,减少了造影剂的使用剂量。
Abstract:Objective To investigate the value of 64-slice and 256-slice spiral CT pulmonary angiography in the diagnosis of pulmonary embolism (PE)in elderly patients. Methods A total of 66 elderly PE patients who received diagnosis from January 2016 to June 2018 were selected and divided into observation group and control group randomly (n=33, each).The observation group was scanned with GE Revolution 256-slice CT, while the control group was scanned with GE-lightspeed 64-slice spiral CT.The dynamic CT values of the main pulmonary artery, the left pulmonary artery, the right pulmonary artery and the pectoralis major muscle were observed.The measured background noise (BN) was the noise value of the main artery.Signal to noise ratio (SNR) and contrast to noise ratio (CNR) were calculated according to the calculation formula.At the same time, the examination time and the dosage of contrast agent were compared. Results There were no significant differences between two groups in the CT value of the main pulmonary artery, the left pulmonary artery, the right pulmonary artery and the pectoralis major muscle, BN, SNR and CNR (n>0.05).Compared with control group, the examination time and contrast agent dosage were fewer in study group [(3.29±1.24)s vs (7.56±1.07)s, (4.77±1.38) mSv vs (5.86±0.94) mSv, P<0.01]. Conclusion Both 64-slice spiral CT and 256-slice spiral CT could diagnose PE well, but 256-slice spiral CT can shorten the examination time and reduce the dosage of contrast agent.
keywords: 64-slice spiral CT 256-slice spiral CT Pulmonary embolism Examination time Contrast agent, dosage
文章编号: 中图分类号:R 563.5, R 445 文献标志码:B
基金项目:2018年度河北省医学科学研究重点课题计划(20180781)
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