摘要
目的:对比Test-Bolus改良法与经验值法在头颈部CTA检查中的应用效果,探讨TestBolus改良法的应用价值。方法:将140例行头颈部CTA检查的患者按随机数字表法分为Test-Bolus经验值法组(A组)和Test-Bolus改良法组(B组),每组70例,分别运用常规经验值法和改良法进行头颈部CTA扫描,测量两组带骨薄层增强图像不同层面(主动脉弓层面、双侧颈动脉窦层面、双侧大脑中动脉M1段层面)动脉血管内的CT值,并对两组减影VR图像进行主观质量评分。结果:A、B两组不同层面动脉血管内CT值差异均无统计学意义(P值均>0.05)。VR图像评分为优、良的例数总和所占百分比分别为:A组77.1%(54/70),B组95.7%(67/70),B组明显高于A组,差异有统计学意义(Z=-9.567,P=0.000)。A组减影VR图像质量主观评分为(3.11±0.28)分,B组为(3.44±0.32)分,B组评分明显高于A组,差异有统计学意义(P<0.05)。结论:头颈部CTA检查中采用Test-Bolus改良法计算增强延迟时间更合理,图像质量更好。
Objective: To compare the effect of the modified Test-Bolus method and the empirical Test-Bolus method in head and neck CT angiography examination.To explore the application value of modified Test-Bolus method. Methods: One hundred and forty patients requiring head and neck CT angiography scanning were divide into empirical Test-Bolus method group (group A) and modified Test-Bolus group (group B) using random number table.Each group has 70 cases.One group was scanned using empirical Test-Bolus method.The other group was scanned using modified Test-Bolus method.Thin-slice CT images including bone were obtained of both groups.The hounsfield unit (HU) of arteries was objectively measured at different levels (level of the aortic arch,bilateral carotid sinus,and bilateral middle cerebral artery M1 segment).Additionally,the subjective quality score of subtracted VR images of the two groups was assessed. Results: There was no significant difference in HUs of the two groups at all of the measured levels ( P >0.05).The percentage of cases with excellent and good VR image quality was 77.1%(54/70) in group A and 95.7%(67/70)in group B.Group B was significantly higher than group A ( Z =-9.567, P <0.001).The subjective quality score of subtraction VR images was 3.11±0.09 in group A and 3.44±0.32 in group B.Group B was significantly higher than group A ( P <0.05). Conclusion: Comparing with empirical Test-Bolus method,it is more reasonable to use modified Test-Bolus method to calculate enhancement delay time in head and neck CTA examination.The quality of images obtained using modified Test-Bolus method was also better in compare with empirical Test-Bolus method.
作者
杨正彬
谢惠
吴绍全
邓小林
吴红敏
YANG Zheng-bin;XIE Hui;WU Shao-quan(Department of Radiology,The People Hospital of Chongqing Dazu District,Chongqing 402360,China)
出处
《放射学实践》
北大核心
2019年第5期486-490,共5页
Radiologic Practice
基金
重庆市大足区2018年度科技发展项目(DZKJ2018ACC1012)
