Abstract #4464
Improved Arrhythmia-Insensitive-Rapid (AIR) cardiac T 1 Mapping with Pulse Sequence Optimization: k-space Ordering and Flip Angle
Kyungpyo Hong 1,2 and Daniel Kim 1
1
UCAIR, Department of Radiology, University
of Utah, Salt Lake City, Utah, United States,
2
Department
of Bioengineering, University of Utah, Salt Lake City,
Utah, United States
Arrhythmia-insensitive-rapid (AIR) cardiac T
1
mapping
pulse sequence is a promising method for imaging
patients with rapid heart rates and/or arrhythmia. We
sought to improve further AIR cardiac T
1
mapping
through k-space ordering and flip angle optimization. In
human volunteers and patients, centric k-space ordering
acquisitions yielded image artifacts arising from eddy
currents, whereas centric-pair k-space ordering
acquisitions suppressed image artifacts. For flip angles
ranging from 25-65, standard deviation decreased with
flip angles, with significant difference in mean T
1
values
for any of the 4 types of measurement (native myocardial
T
1
, native blood T
1
, post-contrast
myocardial T
1
, and post-contrast blood T
1
).
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