Abstract #2950
Impact of noise bias with parallel imaging for axon diameter estimation with q-space MRI
T. Duval 1 , T. Witzel 2 , B. Keil 2 , L. L. Wald 2 , V. Smith 2 , E. Klawiter 2 , and J. Cohen-Adad 1,3
1
Institute of Biomedical Engineering,
Polytechnique Montral, Montral, Qubec, Canada,
2
A.A.
Martinos Center for Biomedical Imaging, Massachusetts
General Hospital, Harvard Medical School, Charlestown,
Massachusetts, United States,
3
Functional
Neuroimaging Unit, CRIUGM, Universit de Montral,
Montral, Qubec, Canada
Parallel imaging is commonly used in q-space diffusion
MRI for reducing susceptibility distortions and scan
time. However its impact on diffusion measurements is
still poorly studied and might introduce some bias at
high b-value due to non-spatially uniform noise level.
In this work we compared AxCaliber results in the human
spinal cord using GRAPPA and a reduced field of view
technique.
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