Modelling of Scatter in the System Matrix for 3D PET Image Reconstruction: A Comparative Study

Moritz Schaar; Magdalena Rafecas

doi:10.1109/NSS/MIC42101.2019.9059797

Modelling of Scatter in the System Matrix for 3D PET Image Reconstruction: A Comparative Study

Institute of Medical Engineering

Abstract

Compton scattering in positron emission tomography (PET) is a major image degrading effect. In this work, an analytical model for Compton scatter is included in the system matrix of two iterative image reconstruction techniques, maximum likelihood expectation maximization (MLEM) and origin ensemble (OE); their performance with respect to conventional MLEM and MLEM with analytic single scatter simulation (SSS) based scatter correction is validated according to the NEMA NU 2-2007 protocol. Background variability is reduced by 9.4% on average compared to MLEM with SSS. Contrast recovery coefficients (CRCs) are improved for larger sources.

Original language	English
Title of host publication	2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)
Publisher	IEEE
Publication date	10.2019
Article number	9059797
ISBN (Print)	978-1-7281-4165-7
ISBN (Electronic)	978-1-7281-4164-0
DOIs	https://doi.org/10.1109/NSS/MIC42101.2019.9059797
Publication status	Published - 10.2019
Event	2019 IEEE Nuclear Science Symposium and Medical Imaging Conference - Manchester, United Kingdom Duration: 26.10.2019 → 02.11.2019 Conference number: 159071

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10.1109/NSS/MIC42101.2019.9059797

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title = "Modelling of Scatter in the System Matrix for 3D PET Image Reconstruction: A Comparative Study",

abstract = "Compton scattering in positron emission tomography (PET) is a major image degrading effect. In this work, an analytical model for Compton scatter is included in the system matrix of two iterative image reconstruction techniques, maximum likelihood expectation maximization (MLEM) and origin ensemble (OE); their performance with respect to conventional MLEM and MLEM with analytic single scatter simulation (SSS) based scatter correction is validated according to the NEMA NU 2-2007 protocol. Background variability is reduced by 9.4% on average compared to MLEM with SSS. Contrast recovery coefficients (CRCs) are improved for larger sources.",

author = "Moritz Schaar and Magdalena Rafecas",

note = "Publisher Copyright: {\textcopyright} 2019 IEEE. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019 ; Conference date: 26-10-2019 Through 02-11-2019",

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Schaar, M & Rafecas, M 2019, Modelling of Scatter in the System Matrix for 3D PET Image Reconstruction: A Comparative Study. in 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)., 9059797, IEEE Nuclear Science Symposium and Medical Imaging Conference, IEEE, 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, Manchester, United Kingdom, 26.10.19. https://doi.org/10.1109/NSS/MIC42101.2019.9059797

Modelling of Scatter in the System Matrix for 3D PET Image Reconstruction: A Comparative Study. / Schaar, Moritz ; Rafecas, Magdalena.
2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). IEEE, 2019. 9059797 (IEEE Nuclear Science Symposium and Medical Imaging Conference).

Research output: Chapters in Books/Reports/Conference Proceedings › Conference contribution

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T1 - Modelling of Scatter in the System Matrix for 3D PET Image Reconstruction: A Comparative Study

AU - Schaar, Moritz

AU - Rafecas, Magdalena

N1 - Conference code: 159071

PY - 2019/10

Y1 - 2019/10

N2 - Compton scattering in positron emission tomography (PET) is a major image degrading effect. In this work, an analytical model for Compton scatter is included in the system matrix of two iterative image reconstruction techniques, maximum likelihood expectation maximization (MLEM) and origin ensemble (OE); their performance with respect to conventional MLEM and MLEM with analytic single scatter simulation (SSS) based scatter correction is validated according to the NEMA NU 2-2007 protocol. Background variability is reduced by 9.4% on average compared to MLEM with SSS. Contrast recovery coefficients (CRCs) are improved for larger sources.

AB - Compton scattering in positron emission tomography (PET) is a major image degrading effect. In this work, an analytical model for Compton scatter is included in the system matrix of two iterative image reconstruction techniques, maximum likelihood expectation maximization (MLEM) and origin ensemble (OE); their performance with respect to conventional MLEM and MLEM with analytic single scatter simulation (SSS) based scatter correction is validated according to the NEMA NU 2-2007 protocol. Background variability is reduced by 9.4% on average compared to MLEM with SSS. Contrast recovery coefficients (CRCs) are improved for larger sources.

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U2 - 10.1109/NSS/MIC42101.2019.9059797

DO - 10.1109/NSS/MIC42101.2019.9059797

M3 - Conference contribution

SN - 978-1-7281-4165-7

T3 - IEEE Nuclear Science Symposium and Medical Imaging Conference

BT - 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

PB - IEEE

T2 - 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference

Y2 - 26 October 2019 through 2 November 2019

ER -

Modelling of Scatter in the System Matrix for 3D PET Image Reconstruction: A Comparative Study

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