Reduced Field of View and Undersampled PR Combined for Interventional Imaging of a Fully Dynamic Field of View

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

doi:10.1002/mrm.20037

Reduced Field of View and Undersampled PR Combined for Interventional Imaging of a Fully Dynamic Field of View

Dana C. Peters, Michael A. Guttman, Alexander J. Dick, Venkatesh K. Raman, Robert J. Lederman, Elliot R. McVeigh

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

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.

Original language	English (US)
Pages (from-to)	761-767
Number of pages	7
Journal	Magnetic resonance in medicine
Volume	51
Issue number	4
DOIs	https://doi.org/10.1002/mrm.20037
State	Published - Apr 2004
Externally published	Yes

Keywords

Catheter tracking
Interventional MRI
Projection reconstruction
Radial imaging
Reduced field of view (rFOV)
Temporal filtering
UNFOLD

ASJC Scopus subject areas

Radiology Nuclear Medicine and imaging

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10.1002/mrm.20037

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title = "Reduced Field of View and Undersampled PR Combined for Interventional Imaging of a Fully Dynamic Field of View",

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.",

keywords = "Catheter tracking, Interventional MRI, Projection reconstruction, Radial imaging, Reduced field of view (rFOV), Temporal filtering, UNFOLD",

author = "Peters, {Dana C.} and Guttman, {Michael A.} and Dick, {Alexander J.} and Raman, {Venkatesh K.} and Lederman, {Robert J.} and McVeigh, {Elliot R.}",

year = "2004",

month = apr,

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volume = "51",

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AU - Peters, Dana C.

AU - Guttman, Michael A.

AU - Dick, Alexander J.

AU - Raman, Venkatesh K.

AU - Lederman, Robert J.

AU - McVeigh, Elliot R.

PY - 2004/4

Y1 - 2004/4

N2 - 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.

AB - 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.

KW - Catheter tracking

KW - Interventional MRI

KW - Projection reconstruction

KW - Radial imaging

KW - Reduced field of view (rFOV)

KW - Temporal filtering

KW - UNFOLD

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Reduced Field of View and Undersampled PR Combined for Interventional Imaging of a Fully Dynamic Field of View

Abstract

Keywords

ASJC Scopus subject areas

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