The diagnostic value and image feature of Spiral CT and MRI imaging in pulmonary embolism

Objective To evaluate diagnosis value and image feature of spiral CT and MRI imaging in pulmonary embolism.Methods 42 patients with pulmonary embolism diagnosed by DSA in our hospital were analyzed retrospectively.All cases were given Spiral CT and MRI angiography examination,and the diagnosis value of the two methods were compared.Results The main performance of spiral CT were pulmonary artery filling defect,distal nonimaging,and 72 embolus which were detected in arterial blood vessels and its branches;the main performance of MRI were pulmonary artery filling defect,the remote signal disappeared,and 61 embolus which were detected.In standard of DSA,the diagnosis rate of pulmonary embolism of spiral CT was 97.62％,which was obviously higher than that of MRI (x2 =5.42,P ＜ 0.05).The embolus detection rate of spiral CT was 94.74％,which was obviously higher than that of MRI(x2 =5.79,P ＜ 0.05).Diagnose embolus rate of spiral CT was 97.74％,which was obriously higher than that of MRI (x2 =4.11,P ＜ 0.05).Leakage and misdiagnosis rate of embolus of spiral CT was 5.26％,which was obriously lower than that of MRI (x2 =6.45,P ＜ 0.05).Conclusion The detection accuracy rate of spiral CT is better than that of MRI imaging.And it is convenient,safe and feasible.Spiral CT can be used as the first noninvasive detection method. Key words: Pulmonary embolism;  Tomography, spiral computed;  Magnetic resonance imaging;  Diagnosis