Abstract #2174
Flip angle modulation in single shot fast spin echo imaging greatly increases speed with little change in diagnostic image quality
Andreas M. Loening 1 , Manojkumar Saranathan 1 , Nichanan Ruangwattanapaisarn 2 , Daniel V. Litwiller 3 , Ann Shimakawa 3 , and Shreyas S. Vasanawala 1
1
Dept. of Radiology, Stanford University
School of Medicine, Stanford, CA, United States,
2
Faculty
of Medicine, Ramathibodi Hospital, Mahidol University,
Bangkok, Thailand,
3
GE Healthcare Global MR
Applications and Workflow, Rochester, MN, Menlo Park,
CA, United States
Single shot fast spin echo acquisition speed is limited
by specific absorption rate (SAR). Instead of using a
constant low flip angle to reduce SAR, we modulated the
refocusing flip angle over the course of the echo train
and achieved an at least doubling of imaging speed
(2-fold reduction in TR) while preserving image quality.
This enabled abdominal scans with fewer, shorter
breath-holds and better registered images.
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