• J Magn Reson Imaging · Jul 2014

    An introduction to ASL labeling techniques.

    • Eric C Wong.
    • Departments of Radiology and Psychiatry, University of California, San Diego, La Jolla, California.
    • J Magn Reson Imaging. 2014 Jul 1;40(1):1-10.

    AbstractArterial spin labeling (ASL) methods allow for quantitative mapping of tissue perfusion in absolute units, without the use of contrast agents. In this technique, the magnetization of arterial blood water is labeled by magnetic inversion or saturation, and the delivery of labeled blood water to tissues is observed. In this review three classes of labeling methods for ASL are described and compared: continuous, pulsed, and velocity-selective. The quantification of perfusion from ASL data is discussed, and methods for the extraction of new types of information using ASL and related techniques, such as mapping of vascular territories or venous oxygenation, are described.© 2014 Wiley Periodicals, Inc.

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