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Improved subtraction by adiabatic FAIR perfusion imaging
Author(s) -
Schepers Janneke,
Garwood Michael,
van der Sanden Boudewijn,
Nicolay Klaas
Publication year - 2002
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.10062
Subject(s) - subtraction , sinc function , adiabatic process , offset (computer science) , physics , image subtraction , excitation , computer science , arterial spin labeling , nuclear magnetic resonance , optics , magnetic resonance imaging , mathematics , artificial intelligence , computer vision , medicine , image processing , radiology , image (mathematics) , arithmetic , binary image , quantum mechanics , thermodynamics , programming language
Abstract For pulsed arterial spin labeling techniques (e.g., FAIR), mismatches between the imaging and inversion slice profile result in a nonperfusion‐related offset. Several methods have been proposed to reduce subtraction errors in FAIR imaging. Here an acquisition method for FAIR experiments based on adiabatic principles is proposed. It is shown that with adiabatic pulses the same pulse can be used for labeling and echo refocusing, thereby reducing the mismatch between imaging and labeling slice. A twofold reduction in subtraction errors compared to 5‐lobe sinc excitation was shown both experimentally and by simulation. Magn Reson Med 47:330–336, 2002. © 2002 Wiley‐Liss, Inc.