Venous thromboembolism is a major national health problem, with an overall age- and sex-adjusted incidence of more than 1 per 1000 annually [1]. Most pulmonary emboli originate from the femoropopliteal veins. Recently, a comprehensive test that uses CT pulmonary angiography and venography to evaluate both deep venous thrombosis and pulmonary embolism has been proposed in place of two or more separate examinations [2-4]. This article illustrates the findings of acute and chronic deep venous thrombosis on CT venography that has been performed in addition to CT pulmonary angiography. The findings are correlated with sonography in select cases. Pitfalls in interpretation of CT venograms are briefly discussed.