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 Constable^1,2

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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