胡桃夹征在多层螺旋CT的表现  

Nut-cracker Sign on MSCT

作　　者：张庆海 孔晓静 蔡幼铨[2] 肖越勇[2] 

机构地区：[1]山东省淄博市第三医院MRI室,255029 [2]北京解放军总医院放射诊断科,100853

出　　处：《中国医学影像学杂志》2006年第6期441-443,共3页Chinese Journal of Medical Imaging

摘　　要：目的：分析胡桃夹征在CT图像的表现特征。材料和方法：回顾性分析7例临床诊断胡桃夹征的CT资料。结果：7例轴位均清晰显示左肾静脉(LRV)通过肠系膜上动脉(SMA)与腹主动脉(AO)夹角处受压变窄,狭窄处前后径(a)与近肾侧左肾静脉前后径(b)的比值为2．67≤b/a≤4．6；矢状位重建图像测量肠系膜上动脉与腹主动脉之间的夹角θ,10°≤θ≤35°；1例清晰显示侧枝循环。结论：胡桃夹征在CT图像具有特征性表现,多层螺旋CT检查具有诊断意义。Purpose： To analyze the features of nut-cracker sign on multi-slcie CT. Materials and Methods： The CT images of 7 cases of clinically diagnosed NCS, were retrospectively analyzed. Results： On the 7 cases, The left renal veins （LRV） were compressed and narrowed at the sites of passing through between superior mesenteric artery（SMA） and abdominal aorta（AO） on axial images. The ratio of b/a, which were the diameters of the narrowed LRV before （a） and after （b） compression,ranged from 2.67 to 4.6. The angle（0） between SMA and AO ranged from 10°to 35°. Collateral vein were detected on one case. Conclusion： The nut-cracker sign on CT images is characteristic and MSCT is helpful for its diagnosis.

关 键 词：胡桃夹现象 左肾静脉 多排螺旋CT 

分 类 号：R816.2[医药卫生—放射医学]