Radiology. 2005 Apr;235(1):218-28. Epub 2005 Feb 16.

Amplitude-modulated continuous arterial spin-labeling 3.0-T perfusion MR imaging with a single coil: feasibility study.

Wang J, Zhang Y, Wolf RL, Roc AC, Alsop DC, Detre JA.

Source

Department of Radiology, and Center for Functional Neuroimaging, University of Pennsylvania, 3 W Gates, 3400 Spruce Street, Philadelphia, PA 19104, USA. wangj3@mail.med.upenn.edu

Abstract

Written informed consent was obtained prior to all human studies after the institutional review board approved the protocol. A continuous arterial spin-labeling technique with an amplitude-modulated control was implemented by using a single coil at 3.0 T. Adiabatic inversion efficiency at 3.0 T, comparable to that at 1.5 T, was achieved by reducing the amplitude of radiofrequency pulses and gradient strengths appropriately. The amplitude-modulated control provided a good match for the magnetization transfer effect of labeling pulses, allowing multisection perfusion magnetic resonance imaging of the whole brain. Comparison of multisection continuous and pulsed arterial spin-labeling methods at 3.0 T showed a 33% improvement in signal-to-noise ratio by using the former approach.

PMID:: 15716390; [PubMed - indexed for MEDLINE]

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