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XFM using a 3D contrast-enhanced MR angiogram. (A) shows a retrograde L iliac radiocontrast angiogram in a contralateral oblique projection. (B) shows the regions of interest (adventitial borders, green) derived from a T1-weighted noncontrast MRI. (C) shows the XFM of both X-ray and MR angiograms. The correspondence is high.
