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Shared k ‐space echo planar imaging with keyhole
Author(s) -
Zaitsev M.,
Zilles K.,
Shah N.J.
Publication year - 2001
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 - 10.1002/1522-2594(200101)45:1<109::aid-mrm1015>3.0.co;2-x
Subject(s) - keyhole , imaging phantom , scanner , computer science , echo planar imaging , computer vision , single shot , planar , echo (communications protocol) , artificial intelligence , image resolution , k space , magnetic resonance imaging , nuclear magnetic resonance , physics , optics , materials science , computer graphics (images) , radiology , medicine , computer network , welding , metallurgy
Time‐dependent phenomena are of great interest, and researchers have sought to shed light on these processes with MRI, particularly in vivo. In this work, a new hybrid technique based on EPI and using the concept of keyhole imaging is presented. By sharing peripheral k ‐space data between images and acquiring the keyhole more frequently, it is shown that the spatial resolution of the reconstructed images can be maintained. The method affords a higher temporal resolution and is more robust against susceptibility and chemical‐shift artifacts than single‐shot EPI. The method, termed shared k ‐space echo planar imaging with keyhole (shared EPIK), has been implemented on a standard clinical scanner. Technical details, simulation results, phantom images, in vivo images, and fMRI results are presented. These results indicate that the new method is robust and may be used for dynamic MRI applications. Magn Reson Med 45:109–117, 2001. © 2001 Wiley‐Liss, Inc.