Abstract #1673
Fat Quantification with an Interleaved Bipolar Acquisition
Abraam S Soliman 1,2 , Curtis Wiens 3 , Trevor Wade 2,4 , Ann Shimakawa 5 , Terry M Peters 1,2 , and Charles A McKenzie 1,4
1
Biomedical Engineering, Western University,
London, Ontario, Canada,
2
Imaging
Research Laboratories, Robarts Research Institute,
London, Ontario, Canada,
3
Radiology,
University of Wisconsin, Madison, Wisconsin, United
States,
4
Medical
Biophysics, Western University, London, Ontario, Canada,
5
Global
MR Applied Science Laboratory, GE Healthcare, Menlo
Park, California, United States
Chemical-shift based multi gradient echo sequences have
been widely used for water/fat separation. Typically, 6
unipolar readout gradients are applied over multiple
shots in order to achieve optimal echo-spacing. Although
single shot bipolar readout acquisition can offer
optimal echo-spacing with shorter scan time, phase
errors can significantly corrupt water/fat separation.
To overcome this problem, a new interleaved bipolar
acquisition is proposed. Accurate fat quantification is
demonstrated in phantom and in-vivo experiments compared
to the well-established unipolar sequence. The proposed
bipolar acquisition scheme offers accurate fat fraction
maps with shorter acquisitions and higher SNR efficiency
compared to unipolar sequences.
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