单层螺旋CT在诊断肺动脉栓塞中的应用(附31例报告)

目的研究单排螺旋 CT 肺动脉造影在肺动脉栓塞诊断中的应用价值。方法对临床怀疑肺动脉栓塞的31例患者,采用单层螺旋 CT 行薄层肺动脉造影(CT pulmonary angiography,CTPA)检查;利用原始数据进行层厚1mm 的轴面重建,比较层厚3mm 和1mm 图像的诊断价值。结果 CTPA 可显示肺动脉栓塞的直接征象(充盈缺损、附壁血栓、完全阻塞)以及间接征象(肺动脉高压、肺梗塞等)。1mm 有效层厚图像对段、亚段肺动脉内血栓的显示高于3mm 有效层厚图像(P<0.05)。结论单层螺旋 CT 肺动脉造影是诊断肺动脉栓塞的快速、有效诊断方法。

Diagnosis of pulmonary embolism with single-slice spiral CT

Objective To evaluate the role of single-slice spiral CT pulmonary angiography in diagnosis of pulmonary embolism(PE).Methods Thin collimation single-slice spiral CT pulmonary angiography(CTPA) was preformed in 31 patients suspected of PE. The raw data were used to perform the reconstruction with lmm section thickness. The axial images of 3mm,1mm section thickness were compared. Results Direct signs in- cluding filling defects, mural thrombus and complete occlusion and indirect signs, such as pulmonary artery hy- pertension, were detected using CTPA.1mm effective thickness images demonstrated more abnormalities in segmental and subsegmental pulmonary arteries, compared with 3 mm effective thickness images(P<0.05). Conclusion Single-slice spiral CT is a fast and valid technique for the diagnosis of PE.