Investigations into possible causes of hot inferior wall artifacts in attenuation corrected cardiac perfusion images

Der Shan Luo; Michael A. King; Hugh T. Morgan; Tin Su Pan; Weishi Xia; P. Hennie Pretorias; James A. Case

doi:10.1109/23.596979

Investigations into possible causes of hot inferior wall artifacts in attenuation corrected cardiac perfusion images

Der Shan Luo, Michael A. King, Hugh T. Morgan, Tin Su Pan, Weishi Xia, P. Hennie Pretorias, James A. Case

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

5 Scopus citations

Abstract

Through our investigations with simulated images, we have identified several causes of hot inferior wall artifacts in attenuation corrected SPECT cardiac perfusion images. With an insufficient number of iterations, the non-uniform resolution recovered in three dimensions and slow convergence rate of ML-EM reconstruction can cause this artifact when the heart is at a shallow angle (the axis of the heart is close to being horizontal) or when there exists significant background activity. Increasing the number of iterations does not correct this artifact when the attenuation map used has poor resolution or its attenuation coefficients used are not accurate. We also notice that the hot inferior wall artifact is more pronounced when body contouring acquisition or 180° angular sampling is used.

Original language	English (US)
Pages (from-to)	1146-1153
Number of pages	8
Journal	IEEE Transactions on Nuclear Science
Volume	44
Issue number	3 PART 2
DOIs	https://doi.org/10.1109/23.596979
State	Published - 1997
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Nuclear Energy and Engineering
Electrical and Electronic Engineering

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title = "Investigations into possible causes of hot inferior wall artifacts in attenuation corrected cardiac perfusion images",

abstract = "Through our investigations with simulated images, we have identified several causes of hot inferior wall artifacts in attenuation corrected SPECT cardiac perfusion images. With an insufficient number of iterations, the non-uniform resolution recovered in three dimensions and slow convergence rate of ML-EM reconstruction can cause this artifact when the heart is at a shallow angle (the axis of the heart is close to being horizontal) or when there exists significant background activity. Increasing the number of iterations does not correct this artifact when the attenuation map used has poor resolution or its attenuation coefficients used are not accurate. We also notice that the hot inferior wall artifact is more pronounced when body contouring acquisition or 180° angular sampling is used.",

author = "Luo, {Der Shan} and King, {Michael A.} and Morgan, {Hugh T.} and Pan, {Tin Su} and Weishi Xia and {Hennie Pretorias}, P. and Case, {James A.}",

note = "Funding Information: 'This publication was made possible by the Grant HL- 50349 from the National Heart, Lung, and Blood Institute. Its contents are solely the responsibility of the authors and do not necessarily represent the official views of the National Heart, Lung and Blood Institute.",

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AU - Luo, Der Shan

AU - King, Michael A.

AU - Morgan, Hugh T.

AU - Pan, Tin Su

AU - Xia, Weishi

AU - Hennie Pretorias, P.

AU - Case, James A.

N1 - Funding Information: 'This publication was made possible by the Grant HL- 50349 from the National Heart, Lung, and Blood Institute. Its contents are solely the responsibility of the authors and do not necessarily represent the official views of the National Heart, Lung and Blood Institute.

PY - 1997

Y1 - 1997

N2 - Through our investigations with simulated images, we have identified several causes of hot inferior wall artifacts in attenuation corrected SPECT cardiac perfusion images. With an insufficient number of iterations, the non-uniform resolution recovered in three dimensions and slow convergence rate of ML-EM reconstruction can cause this artifact when the heart is at a shallow angle (the axis of the heart is close to being horizontal) or when there exists significant background activity. Increasing the number of iterations does not correct this artifact when the attenuation map used has poor resolution or its attenuation coefficients used are not accurate. We also notice that the hot inferior wall artifact is more pronounced when body contouring acquisition or 180° angular sampling is used.

AB - Through our investigations with simulated images, we have identified several causes of hot inferior wall artifacts in attenuation corrected SPECT cardiac perfusion images. With an insufficient number of iterations, the non-uniform resolution recovered in three dimensions and slow convergence rate of ML-EM reconstruction can cause this artifact when the heart is at a shallow angle (the axis of the heart is close to being horizontal) or when there exists significant background activity. Increasing the number of iterations does not correct this artifact when the attenuation map used has poor resolution or its attenuation coefficients used are not accurate. We also notice that the hot inferior wall artifact is more pronounced when body contouring acquisition or 180° angular sampling is used.

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Investigations into possible causes of hot inferior wall artifacts in attenuation corrected cardiac perfusion images

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