Abstract
An approach is described in which the field of view (FOV) along the Y (right/left) phase encoding direction can be dynamically altered during a continuously moving table (CMT) coronal acquisition for extended FOV MRI. We hypothesize that with this method, regions of the anatomy exhibiting significantly different lateral widths can be imaged with a matching local FOVY, thereby improving local lateral spatial resolution, k-space raw data from the variable-FOV CMT acquisition do not allow simple Fourier reconstruction due to the presence of a mixture of phase encodes sampled at different ΔkY intervals. In this work, we employ spline interpolation to re-register the mixed data set onto a uniformly sampled k-space grid. Using this interpolation scheme, we present phantom and peripheral contrast-enhanced MR angiography results demonstrating an approximate 45% improvement in local lateral spatial resolution for continuously moving table acquisitions.
Original language | English (US) |
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Pages (from-to) | 146-151 |
Number of pages | 6 |
Journal | Magnetic resonance in medicine |
Volume | 54 |
Issue number | 1 |
DOIs | |
State | Published - Jul 2005 |
Keywords
- Continuously moving table
- Peripheral contrast-enhanced MRA
- Spatial resolution
- Variable field of view
- k-space interpolation
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging