Meeting Banner
Abstract #1195

Reduction of Respiration Artifacts in 3D Phase Contrast Imaging with Intermittent Fat Saturation

Marcus T. Alley1, Albert Hsiao2, Shreyas S. Vasanawala2

1Radiology , Stanford University, Stanford, CA, United States; 2Radiology, Stanford University, Stanford, CA, United States

Time-resolved 3-dimensional phase-contrast MR imaging (4D-PC MRI) is typically subject to respiration artifacts that can limit anatomic visualization. Navigator gating and respiratory compensation can be used but result in even longer scan times. Because the lipid signal is very bright and tends to originate from close to the chest wall, we hypothesize that the elimination of this signal will reduce the severity of the resulting respiration artifacts. Here we demonstrate that the inclusion of an intermittent fat saturation pulse in a Cartesian 4D-PC acquisition can reduce the artifact severity and improve vascular visualization with no acquisition time penalty.

Abstract PDF Poster PDF

Keywords

acquisition acquisitions addition adds advantage alley arrow artifacts becoming beginning better block breathing cardiac chambers channel chemical circulation clearly clinic close coil collect compensation completion comprehensive conjunction consisted consistent contrast coronal cost delineation depict dimensional disc distributed done doubling dual elimination enabled encodes equally estimation even exam examinations fewer field fixed flow fraction fractional funded future gating greater heart hepatic hope hypothesis immune improve improves inclusion inherent inhomogeneity intend intermittent interpolated interval intrinsic investigate keep leading leaving limit lipid long longer makes matrix minimizes moderate motion nature necessary occlusion overall pair pairs parallel pattern pediatric penalty prior processing producing protocol pseudo pulse pulses radiology random readout reconstructed reconstruction reconstructions reduce reduction related relatively removing required resolution resolved respiration respiratory retrospectively saturation scheme segmentation sensitivities sequential severity slabs slice space spirit spoiler still strength structures subject suppressed suppression temporal tends thick turn typical typically unchanged valuable vascular veins vessels view visualization volume