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目的评价螺旋CT肺动脉造影(sp iral CT pu lmonary angiography,SCTPA)诊断肺栓塞的临床价值及其限度。方法52例肺栓塞均行SCTPA检查。SCTPA扫描时间为0.8 s,扫描层厚3 mm,螺距1.5~2.0,重建层厚1 mm,重建方法包括M IP、MPR和SSD。结果统计52例肺栓塞的2898支血管,其中927支血管SCTPA检出肺栓塞直接征象,约占32.0%;1302支段以上肺动脉中,728支显示肺栓塞的直接征象;1896支亚段肺动脉中,199支显示直接征象。平扫显示间接征象共113例次。结论SCTPA是一种高效、无创性的肺栓塞检查方法,对段以上肺栓塞不仅可做准确的定性诊断,而且可定量分析,但对亚段以下肺栓塞的诊断受限。
Objective To evaluate the clinical value and limitations of splenic CT pu lmonary angiography (SCTPA) in the diagnosis of pulmonary embolism. Methods 52 cases of pulmonary embolism were examined by SCTPA. The SCTPA scan time was 0.8 s, the scan thickness was 3 mm, the pitch was 1.5-2.0, and the reconstruction thickness was 1 mm. The reconstruction methods included M IP, MPR and SSD. Results A total of 2898 pulmonary embolism cases were detected in 52 cases, of which 927 vessels were directly diagnosed pulmonary embolism by SCTPA, accounting for 32.0%. Of the 1302 segments above pulmonary arteries, 728 showed direct signs of pulmonary embolism, 1896 sub-pulmonary arteries , 199 shows direct signs. Indirect signs of plain scan showed a total of 113 cases. Conclusions SCTPA is an efficient and noninvasive method of pulmonary embolism. It not only can make accurate qualitative diagnosis of pulmonary embolism, but also can be quantitatively analyzed, but the diagnosis of pulmonary embolism is limited.