Abstract #2411
Multi-band PROPELLER Imaging with Auto-calibration
Mengye Lyu 1,2 , Yilong Liu 1,2 , Victor B. Xie 1,2 , ErPeng Dai 3 , Hua Guo 3 , and Ed X. Wu 1,2
1
Laboratory of Biomedical Imaging and Signal
Processing, The University of Hong Kong, Hong Kong,
HKSAR, China,
2
Department
of Electrical and Electronic Engineering, The University
of Hong Kong, Hong Kong, HKSAR, China,
3
Center
for Biomedical Imaging Research, Tsinghua University,
Beijing, Beijing, China
PROPELLER MRI is widely used nowadays for motion
correction. One major drawback of PROPELLER MRI is the
long scan time. Previous studies have investigated
in-plane acceleration (SENSE and GRAPPA) in
PROPELLER1,5. However, multi-band (MB) simultaneous
multi-slice acquisition, without SNR penalty
proportional to square root of acceleration ratio, can
be a more suitable solution for accelerating PROPELLER.
In addition, MB acquisition combining PINS RF pulses2
can reduce RF pulse power deposition, which is
particularly useful for alleviating the SAR issue in
FSE-PROPELLER at high field. A considerably low g-factor
is possible in MB PROPELLER because its rotating phase
encoding directions can consequently lead to a
well-conditioned unwrapping problem. Another advantage
of MB PROPELLER is that 3D coil sensitivity maps (CSMs)
can be directly estimated from the oversampled k-space
center, without acquiring additional calibration data.
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