rOi-Space: Accelerated imaging of sub-volumes using ROI focused O-Space
Emre Kopanoglu 1 , Haifeng Wang 1 , Yuqing Wan 1 , Dana C. Peters 1 , Gigi Galiana 1 , and Robert Todd Constable 1
Diagnostic Radiology, Yale University, New
Haven, Connecticut, United States
Nonlinear gradient fields encode spatial information
along multiple directions simultaneously. Using a
receiver-array, the spatial information along different
directions can be recovered. O-Space imaging exploits
this idea to perform accelerated data acquisitions. In
standard O-Space imaging, the full field-of-view is
encoded, which results in acquisition of redundant data
when the region-of-interest is a sub-volume. In this
study, we propose a novel O-Space implementation that
focuses the encoding effort to the region-of-interest.
With a typical O-Space acquisition, the acceleration
factor may exceed the number of receiver coils whereas
the proposed method can further reduce the imaging time
by up-to 25%.
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