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肺栓塞(pulmonary embolism,PE)是由于内源性或外源性栓子栓塞肺动脉或其分支,引起肺循环障碍的临床和病理生理综合征。由于其临床症状、体征及实验室检查特异性较差,漏诊率和误诊率较高。CT肺动脉造影(CT pulmonary angiography,CTPA)以其创伤小、效率高、价格低等优点成为临床诊断PE必不可少的手段之一。CTPA包括电子束CT肺动脉造影(electronbeamCT pulmonary angiography,EBCTPA)、单层螺旋CT肺动脉造影和多层螺旋CT肺动脉造影
Pulmonary embolism (PE) is a clinical and pathophysiological syndrome that causes pulmonary circulatory disorders due to embolization of the pulmonary artery or its branches with endogenous or exogenous emboli. Because of its clinical symptoms, signs and laboratory tests of poor specificity, misdiagnosis and misdiagnosis rate. CT pulmonary angiography (CT pulmonary angiography, CTPA) with its less trauma, high efficiency, low price and other advantages of clinical diagnosis of PE is one of the essential tools. CTPA includes electron beam CT pulmonary angiography (EBCTPA), single-slice spiral CT pulmonary angiography and multi-slice spiral CT pulmonary angiography