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Reduced field of view and undersampled PR combined for interventional imaging of a fully dynamic field of view

✍ Scribed by Dana C. Peters; Michael A. Guttman; Alexander J. Dick; Venkatesh K. Raman; Robert J. Lederman; Elliot R. McVeigh

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
931 KB
Volume
51
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

Active catheter imaging was investigated using real‐time undersampled projection reconstruction (PR) combined with the temporal filtering technique of reduced field of view (rFOV). Real‐time rFOV processing was interactively enabled during highly undersampled catheter imaging, resulting in improved artifact suppression with better temporal resolution than that obtained by view‐sharing. Imaging with 64 to 32 projections provided a resolution of 2 × 2 × 8 mm, and four to eight true frames per second. Image artifacts were reduced when rFOV processing was applied to the undersampled images. A comparison with Cartesian rFOV showed that PR image quality is less susceptible to aliasing that results from rFOV imaging with a wholly dynamic outer FOV. Simulations and MRI experiments demonstrated that PR rFOV provides significant artifact suppression, even for a fully dynamic FOV. The near doubling of temporal resolution that is possible with PR rFOV permits accurate monitoring of highly dynamic events, such as catheter movements, and arrhythmias, such as ventricular ectopy. Magn Reson Med 51:761–767, 2004. © 2004 Wiley‐Liss, Inc.

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