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Vessel-encoded arterial spin-labeling using pseudocontinuous tagging

✍ Scribed by Eric C. Wong

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
474 KB
Volume
58
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

A new signal‐to‐noise ratio (SNR) efficient method is introduced for the mapping of vascular territories based on pseudocontinuous arterial spin labeling (ASL). A pseudocontinuous tagging pulse train is modified using additional transverse gradient pulses and phase cycling to place some arteries in a tag condition, while others passing through the same tagging plane are in a control condition. This is combined with a Hadamard or similar encoding scheme such that all vessels of interest are fully inverted or relaxed for nearly all of the encoding cycles, providing optimal SNR. The relative tagging efficiency for each vessel is measured directly from the ASL data and is used in the decoding process to improve the separation of vascular territories. High SNR maps of left carotid, right carotid, and basilar territories are generated in 6 min of scan time. Magn Reson Med, 2007. © 2007 Wiley‐Liss, Inc.

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