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Motion compensated projection reconstruction
Author(s) -
Schäffter Tobias,
Rasche Volker,
Carlsen Ingwer C.
Publication year - 1999
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/(sici)1522-2594(199905)41:5<954::aid-mrm15>3.0.co;2-j
Subject(s) - computer vision , artificial intelligence , computer science , real time mri , motion compensation , motion (physics) , magnetic resonance imaging , iterative reconstruction , projection (relational algebra) , reduction (mathematics) , process (computing) , compensation (psychology) , motion estimation , mathematics , algorithm , radiology , medicine , psychology , geometry , psychoanalysis , operating system
Over recent years, MRI has shown the capability for real‐time applications. Although the acquisition times of fast MRI methods have been reduced significantly, patient motion during a magnetic resonance imaging (MRI) examination still causes artifacts in the image. In this paper, the effects of motion in MRI using a radial acquisition scheme are examined. It is shown that motion can be estimated without the use of additional measurement, based on the acquired projections only. A new reconstruction technique is introduced that integrates a motion compensation algorithm into the MR‐reconstruction process, resulting in a significant reduction of blurring artifacts in the reconstructed images. The proposed method is applied to different kinds of motion such as kinetic joint studies. Magn Reson Med 41:954–963, 1999. © 1999 Wiley‐Liss, Inc.