目的 探讨多层螺旋CT血管成像(MSCTA)技术对下肢闭塞性动脉硬化症(ASD)的应用价值。 方法 对2007年1月-2009年12月收治的31例ASD患者进行检查，将数据在ADW4.1工作站行容积再现(VR)、最大密度投影(MIP)、多平面重组(MPR)、曲面重组(CPR)等后处理技术并结合原始图像进行综合分析。 结果 血管重建图像31例显示良好，存在不同程度的阻塞，闭塞动脉周围有代偿侧支血管。 结论 MSCTA可清楚地观察下肢动脉的血管形态及管壁的钙化斑块，狭窄程度及闭塞情况。
ObjectiveTo investigate value of MSCT imaging on differentiating low grade pancreatic neuroendo-crine neoplasms (pNENs) from non-low grade pNENs. MethodThe clinical and CT data of 32 patients with pNENs,who were confirmed by pathological diagnosis from January 2014 to August 2015,were collected and analyzed retrospec-tively. ResultsThere were 15 patients with grade 1 in the low grade pNENs group,there were 11 patients with grade 2 and 6 patients with grade 3 in the non-low grade pNENs group.Compared with the low grade pNENs,the non-low grade pNENs had the larger diameter of the tumor (P=0.007),irregular tumor shape (P=0.006),obscure tumor margin (P=0.003),peripancreatic tissue or vascular invasion (P=0.036),lymphadenopathy (P=0.003),distant metastasis (P=0.019),lower absolute enhancement of tumor at the arterial (P=0.003) and the relative enhancement of tumor at the arterial (P=0.013). ConclusionThe analysis of MSCT features might help for differentiating low grade pNENs from non-low grade pNENs,so that more timely selection of appropriate treatment strategies would be made.