Fig. 4

Example images obtained from a patient with chronic DVT on the left leg for 8 years. Thrombus can be detected in the distal superficial femoral and popliteal veins of the left leg by BTI and CE-MRV (red arrows on a & c). Since chronic thrombus contains less met-hemoglobin, most parts of the thrombus are moderate intensities and difficult to be differentiated from incompletely suppressed venous blood using MPRAGE (b). Note that a few parts of the thrombus that look like isolated islands can be seen on MPRAGE images (white arrows on b). This may be due to the resolution of DVT that fresh thrombus generates on the chronic one