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Fig. 7 —33-year-old man with ischemic left foot. Coronal
time-resolved images acquired using 3D time-resolved imaging of contrast
kinetics (TR/TE, 5.2/1.3; slice thickness, 1.8 mm, interpolated to 0.9-mm;
matrix, 320 x 224; number of excitations, 1) performed at 1.5 T using 12
mL of gadolinium contrast agent followed by 20 mL of saline, both at rate of
2.5 mL/s. Temporal resolution of time-resolved images is one image per 9
seconds. Scanning delay is 10 seconds. Contrast arrives in both calf arteries
28 seconds after antecubital IV injection. Venous enhancement begins at 46
seconds, allowing 180-second window for artery-only imaging. Left popliteal
artery is occluded, with segmental reconstitution of left anterior tibial and
posterior tibial arteries. Left peroneal artery is not visualized. Right
posterior tibial artery is occluded at origin, but right peroneal and right
anterior tibial arteries are widely patent. Blood flow arrival time is same on
both sides.
