基于“区域生长”的后处理技术在支气管动脉CT成像中的价值

Value of Post-Processing Technique Based on“Regional Growth”in CT Imaging of Bronchial Artery

目的基于"区域生长"的后处理技术,探索流程更简单、图像显示更优的支气管动脉成像方案。方法共26例患者采用优化的支气管动脉CTA大螺距扫描方案,由两位CT技师分别使用方法A(区域生长+常规方法)和方法B(常规方法)进行CT后处理,后处理时间记录在软件上,然后由两名诊断人员进行分型、评分。结果CT技师1后处理时间A组较B组缩短[(673.04±152.42)s vs.(837.73±154.92)s,P<0.01],CT技师2后处理时间A组较B组缩短[(726.85±148.37)s vs.(813.77±143.99)s,P=0.04]。A组总体质量主观评分4(3~4)较B组3(2-3)高(Z=-7.04,P<0.01);A组VR轮廓主观评分3(3~4)较B组2(2~3)高(Z=-5.94,P<0.01);A组分支显示主观评分2(1~3)较B组1(1~2)高(Z=-3.49,P<0.01);其中A组2例、B组9例支气管动脉开口显示不清(χ^2=5.65,P=0.04)。结论基于"区域生长"的后处理技术使得支气管动脉CTA的后处理时间缩短,检出率提高,VR图像质量得到明显提升。

Objective To explore a bronchial artery imaging scheme with more simple?ow and better display quality based on the"regional growth"post-processing technique.Methods A total of 26 patients were enrolled and scanned with an optimized bronchial artery CTA large-pitch scanning protocol.Two technicians used Method A(regional growth+conventional method)and Method B(conventional method)for post-CT processing.The post-processing time was recorded on the software.The images were classified and scored by two diagnostic personnel.Results The post-processing time of A group recorded by technician 1 was shorter than that of B group[(673.04±152.42)s vs.(837.73±154.92)s,P<0.01].Meanwhile,the post-processing time of A group recorded by technician 2 was shorter than that of B group[(726.85±148.37)s vs.(813.77±143.99)s,P=0.04].A group had a higher subjective score 4(3~4)than B group 3(2~3)(Z=-7.04,P<0.01).Subjective score of VR profile in A group 3(3~4)was higher than that in B group 2(2~3)(Z=-5.94,P<0.01).A group branch display subjective score 2(1~3)was higher than B group 1(1~2)(Z=-3.49,P<0.01).2 cases in A group and 9 cases in B group showed unclear bronchial artery opening(χ^2=5.65,P=0.04).Conclusion Based on the"regional growth"post-processing technique,the post-processing time is shortened,detection rate and the VR image quality are improved.