Tetsuro Sekine1, Yasuo Amano1, Ryo Takagi1, Yasuo Murai2, Yuriko Suzuki3, Shinichiro Kumita1
1Radiology, Nippon Medical School, Tokyo, Japan; 2Neurosurgery, Nippon Medical School, Tokyo, Japan; 3Philips Electronics Japan, Tokyo, Japan
4D Flow assessment was examined in 19 patients after extracranial-intracranial bypass. Analysis: 1, Blood flow volume (BFV). 2, Direction of blood flow. 3, Pressure gradient at the M1. The flow direction correlates with the type of bypass. The pressure gradient at M1 correlates with the BFV difference between BFV of contralateral ICA plus BA and BFV of bypass.