Abstract #1559
Increased speed and image quality for single shot fast spin echo imaging in the pelvis via variable refocusing flip angles and full-Fourier acquisition
Andreas M. Loening 1 , Manojkumar Saranathan 1 , Daniel V. Litwiller 2 , Ann Shimakawa 2 , Lloyd Estkowski 2 , and Shreyas S. Vasanawala 1
1
Dept. of Radiology, Stanford University,
Stanford, CA, United States,
2
GE
Healthcare Global MR Applications and Workflow,
Rochester, MN/Menlo Park, CA, United States
Single shot fast spin echo (SSFSE) imaging is limited in
acquisition speed by specific absorption rate (SAR), and
compromised in image quality due to factors such as
T2-decay over the echo train and half-Fourier k-space
acquisition. We developed a variant utilizing variable
refocusing flip angles (vrfSSFSE) that achieved a 2-fold
reduction in TR at 3T due to reduced SAR, and due to
T2-decay prolongation allowed full-Fourier k-space
acquisition while retaining clinically relevant echo
times. This pulse sequence was clinically tested for
pelvic imaging in 25 patients, and demonstrated a
doubling of imaging speed with improved image quality
measures.
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