MIP images with different optimal window level of FSD (a), QISS (b), and CE-MRA (c) of the calf arteries demonstrate diffused severe lesions in the left anterior tibia artery (ATA) and occlusions in the right ATA and left posterior tibia artery (PTA) in a 65-year-old man with diabetes and renal insufficiency.

<p>Collaterals are seen at the right proximal peroneal artery and PTA (arrow head) as well as the distal calf arteries (arrow). FSD shows better delineation of the arterial lesions and small collaterals compared to QISS. Soft tissue and deep venous contaminations caused by faster deep venous flow appear on the FSD image. But it doesn’t affect the evaluation of arterial lesions because of the high arterial contrast as well as isotropic spatial resolution. MIP: maximum intensity projection; FSD: flow-sensitive dephasing; QISS: quiescent-interval single-shot; CE-MRA: contrast-enhanced MR angiography; PA: peroneal artery (PA).