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High speed bolus tagging: time resolved velocity quantification of pulsatile flow in a single breath hold
Author(s) -
Chien Daisy,
Saloner David,
Laub Gerhard,
Simonetti Orlando,
Anderson Charles M.
Publication year - 1994
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910320517
Subject(s) - pulsatile flow , bolus (digestion) , imaging phantom , blood flow , biomedical engineering , cardiac cycle , nuclear medicine , computer science , medicine , cardiology
We have implemented a high speed method for cardiac‐trig gered blood velocity quantification within a single breath hold on a conventional MR system. The method, based on bolus tagging, was tested using a pulsatile flow phantom and evaluated in vivo. The image acquisition time was reduced by a factor of N by acquiring N phase encode lines per bolus tag application. The clarity of the flow tag was found to vary with how k ‐space was covered during data collection. The technique was optimized and multiple bolus tag images were obtained throughout the cardiac cycle within a single breath‐hold.