Contrast-Enhanced 2D Cine Phase MR Angiography for Measurement of Basilar Artery Blood Flow in Posterior Circulation Ischemia
Takeshi Katoa,
Toshikatsu Indoa,
Eiji Yoshidaa,
Yasushi Iwasakia,
Mie Sonea and
Gen Sobueb
a Department of Neurology, Kasugai Municipal Hospital, Kasugai, Japan
b Department of Neurology, Nagoya University School of Medicine, Nagoya, Japan
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FIG 1. Gradient recalled acquisition in the steady state and contrast-enhanced 2D cine phase MR images.
A, For the determination of the transverse image plane, a sagittal gradient recalled acquisition in the steady state MR image (20/5; flip angle, 60 degrees) was created. The imaging plane was determined at the midpontine level to be perpendicular to the basilar artery.
B, Contrast-enhanced 2D cine phase MR image (40/11.8; flip angle, 30 degrees), acquired at 32 phase. Note the basilar artery as an area of hypointensity (arrow).
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FIG 2. 3D time-of-flight MR angiograms and blood flow velocity data plots.
A, 3D time-of-flight MR angiogram (33/4; flip angle, 20 degrees) of a 49-year-old male patient with PCI and dizziness shows narrowing of the right vertebral and basilar arteries. Change of blood flow velocity between systolic and diastolic phases was greater in the patient than in the normal control volunteer (see B).
B, 3D time-of-flight MR angiogram (33/4; flip angle, 20 degrees) of a 54-year-old female control participant with no clinical signs or symptoms shows mild meandering of the basilar artery.
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