MSCT肠系膜静脉成像延迟时间及重建方式的探讨  

Investigation of the delayed time and post-processing methods of MSCT mesenteric venography

作　　者：魏忠荣[1] 韩丹[2] 陈涛[1] 杨柠娜 陈川梅[1] 杨梅[1] WEI Zhongrong HAN Dan CHEN Tao YANG Ningna CHEN Chuanmei YANG Mei(Departmentof CT,the People＇s Hospital of Yuxi City, Yuxi,Yunnan Province 653100,China)

机构地区：[1]玉溪市人民医院CT室,云南玉溪653100 [2]昆明医科大学第一附属医院影像中心

出　　处：《实用放射学杂志》2016年第10期1605-1608,共4页Journal of Practical Radiology

摘　　要：目的：探讨 MSCT 肠系膜静脉成像的延迟扫描时间及各种图像后处理方式的显像价值。方法 A 组：49例,腹痛行MSCT 肠系膜静脉成像血管未见异常的患者,动脉期后15~20 s 扫描肠系膜静脉期（MV 期）。B 组：49例,腹痛行常规腹部双期增强的患者,动脉期后35 s 扫描第2期。对比2组 MV 图像肠系膜上静脉（SMV）主干 CT 值、直径,评估2组 MV 显影的血管分级、评分及不同后处理方式对 MV 的显示情况。结果A 组 SMV 直径（10.52±2.19）mm,B 组（9.88±2.60）mm 差异无统计学意义（P 〉0.05）；A 组 SMV 主干平均 CT 值（196.55±40.59）HU,B 组为（164.32±28.35）HU 差异有统计学意义（P 〈0.05）；A 组容积再现（VR）对 MV 及属支的显示能力及评分优于 B 组（P 〈0.05）,VR 对血管空间分布走行显示优于最大密度投影（MIP）及薄层滑块最大密度投影（STS-MIP）,STS-MIP 在细微血管显示上较 VR 及 MIP 有优势,曲面重组（CPR）对于显示血管腔内及其与周围结构的毗邻关系较有优势。结论动脉期后15~20 s 行 MV 数据采集较35 s 可获得良好的 MV 图像；各种形式的后处理方式对显示 MV 优势不同。Objective To explore the suitable delayed time of MSCT mesenteric venography and to probe the value of different post-processing methods.Methods 49 patients with abdominal pain （group A）underwent MSCT mesenteric venography with a delayed time of 15-20 s after the arterial phase,and the CT showed the mesenteric vein（MV）was normal.Meanwhile,other 49 ones with abdominal pain （group B）underwent conventional biphasic CT with a delay-time of 35 s after arterial phase.The CT value and diameter of superior mesenteric vein between two groups were compared,and the grading,scoring and display of mesenteric vein with different post-processingmethods were assessed.Results The diameters of SMV were （10.52±2.19）mm in group A and （9.88±2.60）mm in group B,exhibiting no statistically significant difference （P 〉0.05）;Meanwhile the average attenuations of SMV were （1 96.55±40.59）HU in group A and （1 64.32± 28.35）HU in group B,exhibiting a statistically significant difference （P〈0.05）.In addition,the display ability and scoring of mesenteric vein and its branches on volume rendering （VR）in group A were better than those in group B （P 〈0.05）.VR was better in display of the vascular space distribution than maximum intensity projection （MIP）and sliding thin slab maximum intensity projection （STS-MIP）,the STS-MIP was better in display of tiny blood vessels than VR and MIP,and the curved planner reformation （CPR）was superior in display of vascular lumen and the relationship with adjacent structures.Conclusion The image quality of mesenteric vein with the delayed time of 1 5-20 s after arterial phase is superior to that with delayed time of 35 s,and different advantages of the post-processing methods are showed in display of MV.

关 键 词：肠系膜静脉 血管造影术 计算机体层成像 

分 类 号：R322.123[医药卫生—人体解剖和组织胚胎学] R814.43[医药卫生—基础医学]