小剂量团注测试技术在头颈部宝石CTA中的应用

发布时间：2018-03-10 09:27

本文选题：体层摄影术　切入点：X线计算机　出处：《重庆医学》2017年03期 　论文类型：期刊论文

【摘要】：目的探讨小剂量对比剂团注测试(test bolus)的扫描方案在宝石CT头颈部动脉成像中的应用价值。方法将100例行头颈部CTA检查者分为A、B两组,各50例。A组:用20mL对比剂及20mL生理盐水团注测试。B组:用4mL对比剂及20mL生理盐水团注测试。两组测试完后均用50 mL对比剂及50 mL生理盐水行增强扫描。利用微钙化点感兴趣区域(MROI)分析软件观察并测量test期C_4段颈总动脉、平扫期C_4段颈总动脉及大脑中动脉CT值,采用双盲法,由两名有经验的放射科CT技师分别独立进行评价分析。结果两名技师对两组test期C_4段颈总动脉强化情况的评分结果的差异均无统计学意义(U=208、236,P0.05)。两名技师对两组test期C_4段颈总动脉、平扫期C_4段颈总动脉及大脑中动脉CT值测量结果中,两组间差异均无统计学意义(t=0.276、0.243,P0.05)。结论宝石CT行头颈CTA检查时,应用4mL对比剂及20mL生理盐水团注测试,同样能获得良好的图像质量,能满足C_4段颈总动脉达峰时间的准确测量,还降低了总对比剂的用量。
[Abstract]:Objective to evaluate the value of small dose contrast agent group test test bolus in the application of sapphire CT angiography of the head and neck. Methods 100 cases of head and neck CTA were divided into two groups. Group A: 20 mL contrast agent and 20 mL saline group injection test. Group B: 4 mL contrast agent and 20 mL saline group injection test. Both groups were scanned with 50 mL contrast agent and 50 mL normal saline after the test. The region of interest (test) analysis software was used to observe and measure the four segments of carotid artery in test. The CT value of common carotid artery and middle cerebral artery in C4-segment of C _ 4 in plain scan period was determined by double blind method. Results there was no significant difference in the enhancement of C4 carotid arteries between the two groups in test stage. There was no significant difference between the two groups in the evaluation of C4-segment carotid artery enhancement in test stage. The two technicians compared the two groups with C4-segment common carotid artery in test phase. The CT values of common carotid artery and middle cerebral artery were not significantly different between the two groups in plain scan phase. Conclusion when head and neck CTA were performed by sapphire CT, 4 mL contrast agent and 20 mL normal saline were used to measure the CT value of the two groups, and there was no significant difference between the two groups in terms of CT value of C4-segment common carotid artery and middle cerebral artery, and there was no significant difference between the two groups in the CT value of the common carotid artery and the middle cerebral artery. Good image quality can also be obtained, which can satisfy the accurate measurement of the peak time of C _ 4 common carotid artery, and reduce the amount of total contrast agent.
【作者单位】：重庆医科大学附属第一医院放射科;
【基金】：国家临床重点专科建设项目(国卫办医函[2013]544)
【分类号】：R816.1

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