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Implementation of an efficient Monte Carlo calculation for CBCT scatter correction: phantom study
Cone‐beam computed tomography (CBCT) images suffer from poor image quality, in a large part due to contamination from scattered X‐rays. In this work, a Monte Carlo (MC)‐based iterative scatter correction algorithm was implemented on measured phantom data acquired from a clinical on‐board CBCT scanne...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5690008/ https://www.ncbi.nlm.nih.gov/pubmed/26219003 http://dx.doi.org/10.1120/jacmp.v16i4.5393 |
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author | Watson, Peter G.F. Mainegra‐Hing, Ernesto Tomic, Nada Seuntjens, Jan |
author_facet | Watson, Peter G.F. Mainegra‐Hing, Ernesto Tomic, Nada Seuntjens, Jan |
author_sort | Watson, Peter G.F. |
collection | PubMed |
description | Cone‐beam computed tomography (CBCT) images suffer from poor image quality, in a large part due to contamination from scattered X‐rays. In this work, a Monte Carlo (MC)‐based iterative scatter correction algorithm was implemented on measured phantom data acquired from a clinical on‐board CBCT scanner. An efficient EGSnrc user code (egs_cbct) was used to transport photons through an uncorrected CBCT scan of a Catphan 600 phantom. From the simulation output, the contribution from primary and scattered photons was estimated in each projection image. From these estimates, an iterative scatter correction was performed on the raw CBCT projection data. The results of the scatter correction were compared with the default vendor reconstruction. The scatter correction was found to reduce the error in CT number for selected regions of interest, while improving contrast‐to‐noise ratio (CNR) by 18%. These results demonstrate the performance of the proposed scatter correction algorithm in improving image quality for clinical CBCT images. PACS numbers: 87.10.Rt, 87.57.Q‐ |
format | Online Article Text |
id | pubmed-5690008 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-56900082018-04-02 Implementation of an efficient Monte Carlo calculation for CBCT scatter correction: phantom study Watson, Peter G.F. Mainegra‐Hing, Ernesto Tomic, Nada Seuntjens, Jan J Appl Clin Med Phys Medical Imaging Cone‐beam computed tomography (CBCT) images suffer from poor image quality, in a large part due to contamination from scattered X‐rays. In this work, a Monte Carlo (MC)‐based iterative scatter correction algorithm was implemented on measured phantom data acquired from a clinical on‐board CBCT scanner. An efficient EGSnrc user code (egs_cbct) was used to transport photons through an uncorrected CBCT scan of a Catphan 600 phantom. From the simulation output, the contribution from primary and scattered photons was estimated in each projection image. From these estimates, an iterative scatter correction was performed on the raw CBCT projection data. The results of the scatter correction were compared with the default vendor reconstruction. The scatter correction was found to reduce the error in CT number for selected regions of interest, while improving contrast‐to‐noise ratio (CNR) by 18%. These results demonstrate the performance of the proposed scatter correction algorithm in improving image quality for clinical CBCT images. PACS numbers: 87.10.Rt, 87.57.Q‐ John Wiley and Sons Inc. 2015-07-08 /pmc/articles/PMC5690008/ /pubmed/26219003 http://dx.doi.org/10.1120/jacmp.v16i4.5393 Text en © 2015 The Authors. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/3.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Medical Imaging Watson, Peter G.F. Mainegra‐Hing, Ernesto Tomic, Nada Seuntjens, Jan Implementation of an efficient Monte Carlo calculation for CBCT scatter correction: phantom study |
title | Implementation of an efficient Monte Carlo calculation for CBCT scatter correction: phantom study |
title_full | Implementation of an efficient Monte Carlo calculation for CBCT scatter correction: phantom study |
title_fullStr | Implementation of an efficient Monte Carlo calculation for CBCT scatter correction: phantom study |
title_full_unstemmed | Implementation of an efficient Monte Carlo calculation for CBCT scatter correction: phantom study |
title_short | Implementation of an efficient Monte Carlo calculation for CBCT scatter correction: phantom study |
title_sort | implementation of an efficient monte carlo calculation for cbct scatter correction: phantom study |
topic | Medical Imaging |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5690008/ https://www.ncbi.nlm.nih.gov/pubmed/26219003 http://dx.doi.org/10.1120/jacmp.v16i4.5393 |
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