Multivariables analysis showed pleural based consolidation, any pulmonary vascular abnormalities were the two independent variables for the diagnosis of pulmonary embolism in all patients (consecutively, OR=17.6 (95% CI=3.5 - 87.8) and OR=5.5 (95% CI=2.8 - 10.8)) and in patients without pre-existence cardio-pulmonary disease (consecutively, OR=17.6 (95% CI=1.9 - 159.4) and OR=11.5 (95% CI=3.2 - 40.9)).