Near-field artifact reduction using realistic Limited-Field-of-View coded apertures in planar nuclear medicine imaging

D. M. Starfield; D. M. Rubin; T. Marwala

doi:10.1007/978-3-540-36841-0_412

Near-field artifact reduction using realistic Limited-Field-of-View coded apertures in planar nuclear medicine imaging

D. M. Starfield, D. M. Rubin, T. Marwala

University of the Witwatersrand

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

The use of coded apertures in gamma imaging has theoretical advantages over collimators. The near-field conditions of nuclear medicine, however, result in images that are corrupted by near-field artifacts. Work that was limited to ideal coded apertures has shown that near-field artifacts and ghosting can be reduced geometrically. This is achieved by placing multiple identical limited-field-of-view coded apertures side by side, in the form of a matrix. In this paper, a basic analysis extends the work towards useful coded apertures viz. apertures that are realistic in terms of thickness, transmission of the aperture material, and pinhole width. Realistic coded apertures tighten the constraints on the imaging system. Computer simulation results for a two-dimensional digital Shepp- Logan phantom are presented. The results show that realistic coded apertures introduce a new 'tartan' artifact, but that the technique of limiting the field-of-view controls the 'tartan'. Near-field artifacts and ghosting are also reduced. The image is enhanced visually and in terms of a root-mean-square error measurement, which decreases from 74 to 17.

Original language	English
Title of host publication	IFMBE Proceedings
Editors	Sun I. Kim, Tae Suk Suh
Publisher	Springer Verlag
Pages	1672-1676
Number of pages	5
Edition	1
ISBN (Print)	9783540368397
DOIs	https://doi.org/10.1007/978-3-540-36841-0_412
Publication status	Published - 2007
Externally published	Yes
Event	10th World Congress on Medical Physics and Biomedical Engineering, WC 2006 - Seoul, Korea, Republic of Duration: 27 Aug 2006 → 1 Sept 2006

Publication series

Name	IFMBE Proceedings
Number	1
Volume	14
ISSN (Print)	1680-0737
ISSN (Electronic)	1433-9277

Conference

Conference	10th World Congress on Medical Physics and Biomedical Engineering, WC 2006
Country/Territory	Korea, Republic of
City	Seoul
Period	27/08/06 → 1/09/06

Keywords

Limited-field-of-view coded apertures
Near-field artifact reduction
Nuclear medicine imaging

ASJC Scopus subject areas

Bioengineering
Biomedical Engineering

Access to Document

10.1007/978-3-540-36841-0_412

Cite this

@inproceedings{9d0c617f0038431986b5da614b1ba362,

title = "Near-field artifact reduction using realistic Limited-Field-of-View coded apertures in planar nuclear medicine imaging",

abstract = "The use of coded apertures in gamma imaging has theoretical advantages over collimators. The near-field conditions of nuclear medicine, however, result in images that are corrupted by near-field artifacts. Work that was limited to ideal coded apertures has shown that near-field artifacts and ghosting can be reduced geometrically. This is achieved by placing multiple identical limited-field-of-view coded apertures side by side, in the form of a matrix. In this paper, a basic analysis extends the work towards useful coded apertures viz. apertures that are realistic in terms of thickness, transmission of the aperture material, and pinhole width. Realistic coded apertures tighten the constraints on the imaging system. Computer simulation results for a two-dimensional digital Shepp- Logan phantom are presented. The results show that realistic coded apertures introduce a new 'tartan' artifact, but that the technique of limiting the field-of-view controls the 'tartan'. Near-field artifacts and ghosting are also reduced. The image is enhanced visually and in terms of a root-mean-square error measurement, which decreases from 74 to 17.",

keywords = "Limited-field-of-view coded apertures, Near-field artifact reduction, Nuclear medicine imaging",

author = "Starfield, {D. M.} and Rubin, {D. M.} and T. Marwala",

note = "Publisher Copyright: {\textcopyright} International Federation for Medical and Biological Engineering 2007.; 10th World Congress on Medical Physics and Biomedical Engineering, WC 2006 ; Conference date: 27-08-2006 Through 01-09-2006",

year = "2007",

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Starfield, DM, Rubin, DM & Marwala, T 2007, Near-field artifact reduction using realistic Limited-Field-of-View coded apertures in planar nuclear medicine imaging. in SI Kim & TS Suh (eds), IFMBE Proceedings. 1 edn, IFMBE Proceedings, no. 1, vol. 14, Springer Verlag, pp. 1672-1676, 10th World Congress on Medical Physics and Biomedical Engineering, WC 2006, Seoul, Korea, Republic of, 27/08/06. https://doi.org/10.1007/978-3-540-36841-0_412

Near-field artifact reduction using realistic Limited-Field-of-View coded apertures in planar nuclear medicine imaging. / Starfield, D. M.; Rubin, D. M.; Marwala, T.
IFMBE Proceedings. ed. / Sun I. Kim; Tae Suk Suh. 1. ed. Springer Verlag, 2007. p. 1672-1676 (IFMBE Proceedings; Vol. 14, No. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N1 - Publisher Copyright: © International Federation for Medical and Biological Engineering 2007.

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N2 - The use of coded apertures in gamma imaging has theoretical advantages over collimators. The near-field conditions of nuclear medicine, however, result in images that are corrupted by near-field artifacts. Work that was limited to ideal coded apertures has shown that near-field artifacts and ghosting can be reduced geometrically. This is achieved by placing multiple identical limited-field-of-view coded apertures side by side, in the form of a matrix. In this paper, a basic analysis extends the work towards useful coded apertures viz. apertures that are realistic in terms of thickness, transmission of the aperture material, and pinhole width. Realistic coded apertures tighten the constraints on the imaging system. Computer simulation results for a two-dimensional digital Shepp- Logan phantom are presented. The results show that realistic coded apertures introduce a new 'tartan' artifact, but that the technique of limiting the field-of-view controls the 'tartan'. Near-field artifacts and ghosting are also reduced. The image is enhanced visually and in terms of a root-mean-square error measurement, which decreases from 74 to 17.

AB - The use of coded apertures in gamma imaging has theoretical advantages over collimators. The near-field conditions of nuclear medicine, however, result in images that are corrupted by near-field artifacts. Work that was limited to ideal coded apertures has shown that near-field artifacts and ghosting can be reduced geometrically. This is achieved by placing multiple identical limited-field-of-view coded apertures side by side, in the form of a matrix. In this paper, a basic analysis extends the work towards useful coded apertures viz. apertures that are realistic in terms of thickness, transmission of the aperture material, and pinhole width. Realistic coded apertures tighten the constraints on the imaging system. Computer simulation results for a two-dimensional digital Shepp- Logan phantom are presented. The results show that realistic coded apertures introduce a new 'tartan' artifact, but that the technique of limiting the field-of-view controls the 'tartan'. Near-field artifacts and ghosting are also reduced. The image is enhanced visually and in terms of a root-mean-square error measurement, which decreases from 74 to 17.

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Near-field artifact reduction using realistic Limited-Field-of-View coded apertures in planar nuclear medicine imaging

Abstract

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Keywords

ASJC Scopus subject areas

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