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Abstract #3193

Accelerated imaging of sub-volumes using region-of-interest focused O-Space: Experimental verification of rOi-Space

Emre Kopanoglu1, Haifeng Wang1, Gigi Galiana1, Dana C. Peters1, and Robert Todd Constable1,2

1Diagnostic Radiology and Biomedical Imaging, Yale University, New Haven, CT, United States, 2Neurosurgery, Yale University, New Haven, CT, United States

rOi-Space is a region-of-interest imaging technique. The method uses a nonlinear gradient field for improved accelerated imaging similar to O-Space but focuses the encoding effort to the region-of-interest rather than imaging the whole field-of-view. Simulations showed improved reconstruction compared to radial acquisitions for acceleration factors between 2.2 and 14.2 and up to 70% reduction in reconstruction error, for acceleration factors of around 4. Noise performance comparisons demonstrate some degraded SNR performance due to intra-voxel dephasing. Experiments showed improved resolution inside the ROI at the expense of SNR performance. Hence, the method can be used for resolution enhancement in applications with adequate SNR.

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