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Artifact reduction in undersampled projection reconstruction MRI of the peripheral vessels using selective excitation
Author(s) -
Du J.,
Thornton F.J.,
Fain S.B.,
Korosec F.R.,
Browning F.,
Grist T.M.,
Mistretta C.A.
Publication year - 2004
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.20036
Subject(s) - undersampling , streak , coronal plane , artifact (error) , projection (relational algebra) , computer science , image quality , iterative reconstruction , computer vision , reduction (mathematics) , temporal resolution , image resolution , artificial intelligence , plane (geometry) , optics , physics , mathematics , algorithm , image (mathematics) , medicine , radiology , geometry
The projection reconstruction (PR)‐HyperTRICKS (time resolved imaging of contrast kinetics) acquisition integrates the benefits of through‐plane Cartesian slice encoding and in‐plane undersampled PR. It provides high spatial resolution both in‐plane (about 1 mm 2 ) and through‐plane (1–2 mm), as well as relatively high temporal resolution (about 0.25 frames per second). However, undersampling artifacts that originate from anatomy superior or inferior to a coronal imaging FOV may severely degrade the image quality. In coronal MRA acquisitions, the slice coverage is limited in order to achieve high temporal resolution. In this report we describe an artifact reduction method that uses selective excitation in PR‐HyperTRICKS. This technique significantly reduces undersampling streak artifacts while it increases the slice coverage. Magn Reson Med 51:1071–1076, 2004. © 2004 Wiley‐Liss, Inc.