128层螺旋CT血管成像对胆囊动脉的研究

目的：探讨128层CT血管成像（CTA）对胆囊动脉的正常解剖及其变异的显示能力.方法：107例患者采用128层螺旋CT行胆囊动脉成像,并行多平面重组（MPR）、薄层最大密度投影（SMIP）、全体积最大密度投影（VMIP）和容积再现（VR）成像,观察胆囊动脉的起源、支数、走行及其与胆囊三角之间的解剖关系.结果：103例（96.3%）CTA能显示胆囊动脉（n=128）及其起源,起源于正常肝右动脉105支（82.0%）,变异肝右动脉8支（6.3%）,其它动脉15支（11.7%）;单支胆囊动脉78例（75.7%）,双支胆囊动脉25例（24.3%）,共同起源于正常肝右动脉20例（80%）.98例（95.1%）MPR、SMIP图像能清晰地显示胆囊动脉与胆囊三角之间的解剖关系,1支胆囊动脉走行于胆囊三角内55例（56.1%）,1支胆囊动脉走行于胆囊三角外18例（18.4%）,1支胆囊动脉走行于胆囊三角内而另外1支走行于胆囊三角外18例（18.4%）.103例横轴面CT、MPR和SMIP图像均能显示胆囊动脉,VMIP图像能显示胆囊动脉92支（71.9%）,VR图像仅能显示胆囊动脉59支（46.1%）.结论：CTA能清晰地显示胆囊动脉的起源、支数、走行及其与胆囊三角之间的解剖关系,为临床外科提供解剖学依据.

Cystic artery with 128-detector row spiral CT angiography

Objective:To discuss the capability of 128-detector row spiral CT angiography(CTA) in displaying the anatomy and variations of cystic artery.Methods:The cystic artery CTA was performed with 128-detector row spiral CT for 107 cases and the raw data were reconstructed with multi-planar reformation(MPR),thin-section maximum intensity projection(SMIP),volume maximum intensity projection(VMIP) and volume rendering(VR) technology.The origin,branches and course of cystic arteries and their anatomy relationship wit...