Comparison Study On MSCTPA And V/Q Imaging In Diagnosis Of Pulmonary Embolism

Objective:To evaluate the diagnostic value of Multislice Spiral Computer Tomography pulmonary Angiography (MSCTPA) and radionuclide lung ventilation-perfusion (V/Q) imaging in pulmonary embolism. Methods:To analyze 196 patients clinical suspected pulmonary embolism, with 129 males and 83 females, during 2009-2010 in our hosipital, and with an average age of (58.73±15.84) years.129 patients got MSCTPA,and other 67 patients were checked in radionuclide lung ventilation-perfusion (V/Q) imaging. At the end, evaluate separately the diagnostic value of two imaging methods in asccord of final clinical diagnosis. Result:The sensitivity, specificity, accuracy, positive predictive value, negative predictive value, positive likelihood ratio, negative likelihood ratio of MSCTPA respectively is:89.69%,96.88%,91.47%,98.86%,75.61%,28.7,0.11; While the sensitivity, specificity, accuracy, positive predictive value, negative predictive value, positive likelihood ratio, negative likelihood ratio of V/Q respectively is:92.11%82.76%, 88.06%,87.5%,88.19%,5.34,0.095. Conclusion:The specificity of MSCTPA is higher than V/Q, while the sensitivity of V/Q is higher than MSCTPA.Especially, the detection rate of V/Q is higher than MSCTPA for subsegmental PE. And union application of MSCTPA and V/Q will be better to diagnostic PE,as both of then are effective and noninvasive imaging metheds in diagnosis of PE.