Correction for acceleration-induced displacement artifacts in phase contrast imaging
2000 (English)In: Magnetic Resonance in Medicine, ISSN 0740-3194, E-ISSN 1522-2594, Vol. 43, no 5, 734-738 p.Article in journal (Refereed) Published
The acceleration-induced displacement artifact impairs the accuracy of MR velocity measurements. This study proposes a post processing method for correction of this artifact. Velocity measurements were performed in a flow phantom containing a constriction. Velocity curves were obtained from streamlines parallel to the frequency, phase, and slice directions, respectively. The acceleration-induced displacement artifact was most prominent when the frequency encoding direction was aligned with the flow direction. After correction, velocity assignment improved and a more accurate description of the flow was obtained. In vivo measurements were performed in the aorta in a patient with a repaired aortic coarctation. The correction method was applied to velocity data along a streamline parallel to the frequency encoding direction. The result after correction was a new location of the peak velocity and improved estimates of the velocity gradients.
Place, publisher, year, edition, pages
2000. Vol. 43, no 5, 734-738 p.
National CategoryMedical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-26712DOI: 10.1002/(SICI)1522-2594(200005)43:5<734::AID-MRM16>3.0.CO;2-ALocal ID: 11306OAI: oai:DiVA.org:liu-26712DiVA: diva2:247262