Arterial spin labeling of cerebral perfusion territories using a separate labeling coil.

Journal of Magnetic Resonance Imaging : JMRI
Fernando F PaivaAfonso C Silva

Abstract

To obtain cerebral perfusion territories of the left, the right, and the posterior circulation in humans with high signal-to-noise ratio (SNR) and robust delineation. Continuous arterial spin labeling (CASL) was implemented using a dedicated radio frequency (RF) coil, positioned over the neck, to label the major cerebral feeding arteries in humans. Selective labeling was achieved by flow-driven adiabatic fast passage and by tilting the longitudinal labeling gradient about the Y-axis by theta = +/- 60 degrees . Mean cerebral blood flow (CBF) values in gray matter (GM) and white matter (WM) were 74 +/- 13 mL . 100 g(-1) . minute(-1) and 14 +/- 13 mL . 100 g(-1) . minute(-1), respectively (N = 14). There were no signal differences between left and right hemispheres when theta = 0 degrees (P > 0.19), indicating efficient labeling of both hemispheres. When theta = +60 degrees , the signal in GM on the left hemisphere, 0.07 +/- 0.06%, was 92% lower than on the right hemisphere, 0.85 +/- 0.30% (P < 1 x 10(-9)), while for theta = -60 degrees , the signal in the right hemisphere, 0.16 +/- 0.13%, was 82% lower than on the contralateral side, 0.89 +/- 0.22% (P < 1 x 10(-10)). Similar attenuations were obtained in WM. Clear delineation of ...Continue Reading

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Citations

Mar 1, 2012·Translational Stroke Research·Renata F LeoniAfonso C Silva
Jan 16, 2014·Journal of Magnetic Resonance Imaging : JMRI·Eric C Wong
Oct 4, 2016·International Journal of Imaging Systems and Technology·Randall B StaffordJongho Lee
Sep 24, 2014·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Geon-Ho JahngFernando Calamante

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