Duplex Color flow Doppler is performed in the Rt or Lt lower extremities. Images of the common femoral vein, deep femoral vein, superficial femoral vein, popliteal vein, posterior tibial vein, anterior tibial vein, and peritoneal vein. Any areas of occlusion, thrombus, and reflux is noted. Images are sent to the radiologist and a report is sent to your doctor that day.