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. Author manuscript; available in PMC: 2009 Feb 10.
Published in final edited form as: J Magn Reson Imaging. 2008 Aug;28(2):538–542. doi: 10.1002/jmri.21409

Figure 5.

Figure 5

Intraarterial contrast injections after recanalization of a chronic total occlusion. a: Coronal MRA using standard (systemic intravenous) clinical techniques showing occluded left carotid artery. In this MIP angle the vertebral artery partly overlies the occluded L carotid artery. b: RT image frame after guidewire and catheter have traversed occlusion. Arrow indicates approximate catheter tip position. c: timeMIP image showing contrast injection through catheter, indicating catheter has reentered the lumen distal to the occlusion. Noise is higher due to faint signal and automatic brightness adjustment. d: After several balloon inflations, the catheter is positioned proximally and timeMIP view of injection indicates successful angioplasty, verified by MRA (not shown). Some ghosting from rate 4 view sharing is visible.