Image reconstruction in asymmetric fan-beam scans with spatially varying focal lengths

Lifeng Yu; Xiaochuan Pan; Charles A. Pelizzari

doi:10.1117/12.535326

Image reconstruction in asymmetric fan-beam scans with spatially varying focal lengths

Lifeng Yu, Xiaochuan Pan, Charles A. Pelizzari

Radiology

Research output: Contribution to journal › Conference article › peer-review

Abstract

We propose a generalized algorithm for image reconstruction from data acquired in an asymmetric fan-beam configuration with a spatially varying focal length. This algorithm is an extension of our previous algorithm for fan-beam computed tomography (CT) that involves a shift-variant filtering. As compared to the existing algorithms, the proposed algorithm involves no additional explicit interpolation and eliminates the spatially-variant weighting factor. Therefore, it retains the spatial resolution and is less susceptible to data noise. We performed computer-simulation studies to validate and evaluate the proposed algorithm, and quantitative results demonstrate that the proposed algorithm possesses desirable noise and numerical properties.

Original language	English (US)
Pages (from-to)	678-684
Number of pages	7
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5370 I
DOIs	https://doi.org/10.1117/12.535326
State	Published - 2004
Event	Progress in Biomedical Optics and Imaging - Medical Imaging 2004: Imaging Processing - San Diego, CA, United States Duration: Feb 16 2004 → Feb 19 2004

Keywords

Asymmetric configuration
Computed tomography (CT)
Fan-beam projection
Image reconstruction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.535326

Cite this

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title = "Image reconstruction in asymmetric fan-beam scans with spatially varying focal lengths",

abstract = "We propose a generalized algorithm for image reconstruction from data acquired in an asymmetric fan-beam configuration with a spatially varying focal length. This algorithm is an extension of our previous algorithm for fan-beam computed tomography (CT) that involves a shift-variant filtering. As compared to the existing algorithms, the proposed algorithm involves no additional explicit interpolation and eliminates the spatially-variant weighting factor. Therefore, it retains the spatial resolution and is less susceptible to data noise. We performed computer-simulation studies to validate and evaluate the proposed algorithm, and quantitative results demonstrate that the proposed algorithm possesses desirable noise and numerical properties.",

keywords = "Asymmetric configuration, Computed tomography (CT), Fan-beam projection, Image reconstruction",

author = "Lifeng Yu and Xiaochuan Pan and Pelizzari, {Charles A.}",

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pages = "678--684",

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T1 - Image reconstruction in asymmetric fan-beam scans with spatially varying focal lengths

AU - Yu, Lifeng

AU - Pan, Xiaochuan

AU - Pelizzari, Charles A.

PY - 2004

Y1 - 2004

N2 - We propose a generalized algorithm for image reconstruction from data acquired in an asymmetric fan-beam configuration with a spatially varying focal length. This algorithm is an extension of our previous algorithm for fan-beam computed tomography (CT) that involves a shift-variant filtering. As compared to the existing algorithms, the proposed algorithm involves no additional explicit interpolation and eliminates the spatially-variant weighting factor. Therefore, it retains the spatial resolution and is less susceptible to data noise. We performed computer-simulation studies to validate and evaluate the proposed algorithm, and quantitative results demonstrate that the proposed algorithm possesses desirable noise and numerical properties.

AB - We propose a generalized algorithm for image reconstruction from data acquired in an asymmetric fan-beam configuration with a spatially varying focal length. This algorithm is an extension of our previous algorithm for fan-beam computed tomography (CT) that involves a shift-variant filtering. As compared to the existing algorithms, the proposed algorithm involves no additional explicit interpolation and eliminates the spatially-variant weighting factor. Therefore, it retains the spatial resolution and is less susceptible to data noise. We performed computer-simulation studies to validate and evaluate the proposed algorithm, and quantitative results demonstrate that the proposed algorithm possesses desirable noise and numerical properties.

KW - Asymmetric configuration

KW - Computed tomography (CT)

KW - Fan-beam projection

KW - Image reconstruction

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DO - 10.1117/12.535326

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VL - 5370 I

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EP - 684

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - Progress in Biomedical Optics and Imaging - Medical Imaging 2004: Imaging Processing

Y2 - 16 February 2004 through 19 February 2004

ER -

Image reconstruction in asymmetric fan-beam scans with spatially varying focal lengths

Abstract

Keywords

ASJC Scopus subject areas

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