Abstract #3227
MRI planning for SAR management in pTx systems
Joaquin L. Herraiz 1 , Yigitcan Eryaman 1,2 , Esra Abaci Turk 1 , Angel Torrado-Carvajal 1,3 , Adrian Martin 1,4 , Emanuele Schiavi 1,4 , Bastien Guerin 5 , Elfar Adalsteinsson 1,6 , Lawrence L. Wald 5,7 , Juan A. Hernandez-Tamames 1,3 , and Norberto Malpica 1,3
1
Madrid-MIT M+Vision Consortium in RLE,
Massachusetts Institute of Technology, Cambridge, MA,
United States,
2
Center
for Magnetic Resonance Research,Department of Radiology,
University of Minnesota, Minneapolis, MN, United States,
3
Medical
Image Analysis and Biometry Laboratory, Universidad Rey
Juan Carlos, Madrid, Spain,
4
Dept.
of Applied Mathematics, Universidad Rey Juan Carlos,
Mostoles, Madrid, Spain,
5
Martinos
Center for Biomedical Imaging, Dept. of Radiology, MGH,
Charlestown, MA, United States,
6
Dept.
of Electrical Engineering and Computer Science,
Harvard-MIT Health Sciences and Technology,
Massachusetts Institute of Technology, Cambridge, MA,
United States,
7
Harvard-MIT
Health Sciences and Technology, Massachusetts Institute
of Technology, Cambridge, MA, United States
Current approaches to acquire clinical 7-T MR data
within acceptable SAR limits require imaging with
reduced flip angle and/or number of slices, which
reduces SNR/Contrast/Detectability, thereby undermining
the potential benefits of high-resolution imaging.
Parallel transmission RF pulse design has recently shown
to be able to manage global and local SAR in 7-T systems
if a correct patient head and torso model is known.
Nevertheless, it is unclear if patient-specific SAR
reduction methods could be implemented in a feasible way
in the clinical practice in the near future. In this
work, we propose an effective protocol for enabling
patient-specific SAR modeling and reduction to utilize
the full capability and clinical promise of 7-T MR
imaging.
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