Postoperative Assessment of Extracranial–Intracranial Bypass by Time-Resolved 3D Contrast-Enhanced MR Angiography Using Parallel Imaging
Kazuhiro Tsuchiyaa,
Keita Honyaa,
Akira Fujikawaa,
Hidekatsu Tateishib and
Yoshiaki Shiokawab
a Department of Radiology, Kyorin University School of Medicine, Tokyo, Japan
b Department of Neurosurgery, Kyorin University School of Medicine, Tokyo, Japan
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FIG 1. A 57-year-old man 7 months after STA-MCA anastomosis for stenosis of the right MCA.
A, 3D-TOF MR angiogram shows patent anastomosis between the 2 STA branches and distal branches of the right MCA (M2).
B–D, Selected frames of CE MRA show corresponding findings. Flow to the distal parts of the M2 branches is better demonstrated in these images than by MRA.
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FIG 2. A 43-year-old woman 3 weeks after EC-MCA anastomosis by using a radial-artery graft for occlusion of the right ICA for treatment of a large ICA aneurysm.
A, 3D-TOF MR angiogram shows a patent radial artery graft and distal MCA branches. Note that the more distal MCA branches cannot be fully visualized due to the limited section thickness.
B, Conventional DSA images confirm the patent anastomosis and good distal flow.
C–E, Selected frames of CE MRA show corresponding findings.
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