Correction for acceleration-induced displacement artifacts in phase contrast imaging

Thunberg, Per, 1968- (author): Linköpings universitet,Institutionen för medicinsk teknik,Klinisk fysiologi,Hälsouniversitetet

Wigström, Lars, 1967- (author): Linköpings universitet,Institutionen för medicinsk teknik,Klinisk fysiologi,Hälsouniversitetet

Wranne, Bengt, 1940- (author): Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet

Engvall, Jan, 1953- (author): Linköpings universitet,Klinisk fysiologi,Hälsouniversitetet

Karlsson, Matts, 1965- (author): Linköpings universitet,Institutionen för medicinsk teknik,Tekniska högskolan

(creator_code:org_t)

New York, USA : John Wiley & Sons, 2000
2000
English.
In: Magnetic Resonance in Medicine. - New York, USA : John Wiley & Sons. - 0740-3194 .- 1522-2594. ; 43:5, s. 734-738

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; https://urn.kb.se/re...; show less...

Abstract Subject headings

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.

By the author/editor: Thunberg, Per, 1 ...; Wigström, Lars, ...; Wranne, Bengt, 1 ...; Engvall, Jan, 19 ...; Karlsson, Matts, ...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Radiology Nuclea ...

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