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TOF‐MRA using multi‐oblique‐stack acquisition (MOSA)
Author(s) -
Wu Ed X.,
Hui Edward S.,
Cheung Jerry S.
Publication year - 2007
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.20954
Subject(s) - maximum intensity projection , oblique case , computer science , stack (abstract data type) , image quality , magnetic resonance angiography , computer vision , projection (relational algebra) , intensity (physics) , biomedical engineering , pixel , materials science , artificial intelligence , magnetic resonance imaging , angiography , physics , optics , image (mathematics) , medicine , radiology , algorithm , philosophy , linguistics , programming language
Purpose To alleviate the intrinsic limitation of current time‐of‐flight magnetic resonance angiography (TOF‐MRA) techniques, which are insensitive to in‐plane blood flow due to the flow saturation effect. Materials and Methods A multi‐oblique‐stack acquisition (MOSA) technique was proposed in this study to tackle this TOF problem by acquiring two or more TOF image stacks bearing different orientations. The MOSA approach was evaluated in human brain MR angiograms by integrating it with the widely used multiple overlapping thin‐slab acquisition (MOTSA) technique. Two TOF image sets in different orientations were acquired using MOTSA. They were combined pixel‐by‐pixel by taking the maximum intensity value. Maximum intensity projection (MIP) was then performed, and the resulting MRA quality was assessed. Results The results demonstrated that MR angiograms obtained by MOSA‐MOTSA were clearly improved compared to those acquired by conventional MOTSA in the same scan time. Conclusion MOSA clearly demonstrates its advantage over conventional TOF acquisition in visualizing in‐plane blood flows. J. Magn. Reson. Imaging 2007. © 2007 Wiley‐Liss, Inc.