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.
