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Crosstalk Reduction Using a Dual Energy Window Scatter Correction in Compton Imaging

Compton cameras can simultaneously detect multi-isotopes; however, when simultaneous imaging is performed, crosstalk artifacts appear on the images obtained using a low-energy window. In conventional single-photon emission computed tomography, a dual energy window (DEW) subtraction method is used to...

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Autores principales: Sakai, Makoto, Parajuli, Raj Kumar, Kubota, Yoshiki, Kubo, Nobuteru, Yamaguchi, Mitsutaka, Nagao, Yuto, Kawachi, Naoki, Kikuchi, Mikiko, Arakawa, Kazuo, Tashiro, Mutsumi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7249665/
https://www.ncbi.nlm.nih.gov/pubmed/32357411
http://dx.doi.org/10.3390/s20092453
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author Sakai, Makoto
Parajuli, Raj Kumar
Kubota, Yoshiki
Kubo, Nobuteru
Yamaguchi, Mitsutaka
Nagao, Yuto
Kawachi, Naoki
Kikuchi, Mikiko
Arakawa, Kazuo
Tashiro, Mutsumi
author_facet Sakai, Makoto
Parajuli, Raj Kumar
Kubota, Yoshiki
Kubo, Nobuteru
Yamaguchi, Mitsutaka
Nagao, Yuto
Kawachi, Naoki
Kikuchi, Mikiko
Arakawa, Kazuo
Tashiro, Mutsumi
author_sort Sakai, Makoto
collection PubMed
description Compton cameras can simultaneously detect multi-isotopes; however, when simultaneous imaging is performed, crosstalk artifacts appear on the images obtained using a low-energy window. In conventional single-photon emission computed tomography, a dual energy window (DEW) subtraction method is used to reduce crosstalk. This study aimed to evaluate the effectiveness of employing the DEW technique to reduce crosstalk artifacts in Compton images obtained using low-energy windows. To this end, in this study, we compared reconstructed images obtained using either a photo-peak window or a scatter window by performing image subtraction based on the differences between the two images. Simulation calculations were performed to obtain the list data for the Compton camera using a 171 and a 511 keV point source. In the images reconstructed using these data, crosstalk artifacts were clearly observed in the images obtained using a 171 keV photo-peak energy window. In the images obtained using a scatter window (176–186 keV), only crosstalk artifacts were visible. The DEW method could eliminate the influence of high-energy sources on the images obtained with a photo-peak window, thereby improving quantitative capability. This was also observed when the DEW method was used on experimentally obtained images.
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spelling pubmed-72496652020-06-10 Crosstalk Reduction Using a Dual Energy Window Scatter Correction in Compton Imaging Sakai, Makoto Parajuli, Raj Kumar Kubota, Yoshiki Kubo, Nobuteru Yamaguchi, Mitsutaka Nagao, Yuto Kawachi, Naoki Kikuchi, Mikiko Arakawa, Kazuo Tashiro, Mutsumi Sensors (Basel) Article Compton cameras can simultaneously detect multi-isotopes; however, when simultaneous imaging is performed, crosstalk artifacts appear on the images obtained using a low-energy window. In conventional single-photon emission computed tomography, a dual energy window (DEW) subtraction method is used to reduce crosstalk. This study aimed to evaluate the effectiveness of employing the DEW technique to reduce crosstalk artifacts in Compton images obtained using low-energy windows. To this end, in this study, we compared reconstructed images obtained using either a photo-peak window or a scatter window by performing image subtraction based on the differences between the two images. Simulation calculations were performed to obtain the list data for the Compton camera using a 171 and a 511 keV point source. In the images reconstructed using these data, crosstalk artifacts were clearly observed in the images obtained using a 171 keV photo-peak energy window. In the images obtained using a scatter window (176–186 keV), only crosstalk artifacts were visible. The DEW method could eliminate the influence of high-energy sources on the images obtained with a photo-peak window, thereby improving quantitative capability. This was also observed when the DEW method was used on experimentally obtained images. MDPI 2020-04-26 /pmc/articles/PMC7249665/ /pubmed/32357411 http://dx.doi.org/10.3390/s20092453 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sakai, Makoto
Parajuli, Raj Kumar
Kubota, Yoshiki
Kubo, Nobuteru
Yamaguchi, Mitsutaka
Nagao, Yuto
Kawachi, Naoki
Kikuchi, Mikiko
Arakawa, Kazuo
Tashiro, Mutsumi
Crosstalk Reduction Using a Dual Energy Window Scatter Correction in Compton Imaging
title Crosstalk Reduction Using a Dual Energy Window Scatter Correction in Compton Imaging
title_full Crosstalk Reduction Using a Dual Energy Window Scatter Correction in Compton Imaging
title_fullStr Crosstalk Reduction Using a Dual Energy Window Scatter Correction in Compton Imaging
title_full_unstemmed Crosstalk Reduction Using a Dual Energy Window Scatter Correction in Compton Imaging
title_short Crosstalk Reduction Using a Dual Energy Window Scatter Correction in Compton Imaging
title_sort crosstalk reduction using a dual energy window scatter correction in compton imaging
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7249665/
https://www.ncbi.nlm.nih.gov/pubmed/32357411
http://dx.doi.org/10.3390/s20092453
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