Objective：

To evaluate the value of color Doppler ultrasound in diagnosis of calf venous thrombosis.

Methods：

Ultrasonographic features of 285 cases with calf venous thrombosis confirmed by intravenous angiography or follow-up outcomes of anticoagulant therapy were analyzed retrospectively.

Results：

Among the cases with calf venous thrombosis

166 were unilateral and 19 were bilateral. The common sites were calf muscular vein

posterior tibial vein

fibular vein and anterior tibial vein in sequence.

Conclusion：

Color Doppler ultrasound is clear

direct-viewing and safe. It could provide accurately anatomic changes in calf venous thrombosis. It may be used as the first-line imaging modality in the diagnosis of calf venous thrombosis.