Single scan MR velocity quantification in ROI by alternating velocity encoding gradient pulse polarity between phase encoding steps

Public Deposited
Analytics

Downloadable Content

Download PDF
Request Version for Screen Reader
Last Modified
  • March 21, 2019
Creator
  • Jonathan, Bremer
    • Affiliation: School of Medicine, UNC/NCSU Joint Department of Biomedical Engineering
Abstract
  • A single scan phase contrast method for quantifying velocity in a region of interest (ROI) containing flowing spins identified prior to scanning is introduced. k-space coverage involves applying positive velocity encoding gradient pulses in acquiring odd phase encoding lines and negative velocity encoding gradient pulses in acquiring even phase encoding lines or vice versa, effectively under sampling flowing spins by a factor of two. A ghost image due to flowing spins in the ROI is formed. The ghost image is located half a field of view away from the ROI in the phase encoding direction. Prior to image acquisition, the field of view in the localizer image is adjusted so that the subsequent ghost image does not overlap with the object being imaged. Velocity quantification is done using image values in ROI and the ghost image. The proposed method is compared to conventional phase contrast in phantom and in vivo. The proposed method reduces scan time considerably.
Date of publication
DOI
Resource type
Rights statement
  • In Copyright
Advisor
  • Lin, Weili
Language
Access right
  • Open access
Date uploaded
  • October 11, 2010

Relations

Parents:

This work has no parents.

Items

Thumbnail Title Date Uploaded Visibility Actions
file details Single scan MR velocity quantification in ROI by alternating velocity encoding gradient pulse polarity between phase encoding steps 2019-04-07 Public Download