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Error assessment due to coronary stents in flow‐encoded phase contrast MR angiography: a phantom study
Author(s) -
Lethimonnier F.,
Bouligand B.,
Thouveny F.,
Furber A.,
Jallet P.,
CaronPoitreau C.,
Le Jeune J.J.
Publication year - 1999
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/(sici)1522-2586(199911)10:5<899::aid-jmri40>3.0.co;2-1
Subject(s) - imaging phantom , artifact (error) , magnetic resonance imaging , phase contrast microscopy , contrast (vision) , radiology , medicine , nuclear magnetic resonance , nuclear medicine , physics , computer science , optics , artificial intelligence
Phase contrast magnetic resonance imaging (PC MRI) is a promising method for assessing coronary flow. MR angiography images in the presence of coronary stents display artifacts because of the metal present in the stent. Using a flow phantom, the goal of this in vitro study was to assess quantitatively the effects of flow dephasing caused by magnetic susceptibility in velocity measurements in a region where the artifact is not visualized in a magnitude image. The results showed that for high velocities, significant errors in measurements exist around the stent, outside the susceptibility artifact visible on a magnitude image. J. Magn. Reson. Imaging 1999;10:899–902. © 1999 Wiley‐Liss, Inc.