Decomposing a prior-CT-based cone-beam CT projection correction algorithm into scatter and beam hardening components
A scatter correction algorithm (SCA) for cone beam CT (CBCT) projections, making use of prior information obtained by deformable image registration of CT to CBCT, has recently been proposed and tested for particle therapy dose calculation. The SCA relies on subtraction of digitally reconstructed rad...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-07-01
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| Series: | Physics and Imaging in Radiation Oncology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405631617300064 |
| _version_ | 1828866007010115584 |
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| author | Christoph Zöllner Simon Rit Christopher Kurz Gloria Vilches-Freixas Florian Kamp George Dedes Claus Belka Katia Parodi Guillaume Landry |
| author_facet | Christoph Zöllner Simon Rit Christopher Kurz Gloria Vilches-Freixas Florian Kamp George Dedes Claus Belka Katia Parodi Guillaume Landry |
| author_sort | Christoph Zöllner |
| collection | DOAJ |
| description | A scatter correction algorithm (SCA) for cone beam CT (CBCT) projections, making use of prior information obtained by deformable image registration of CT to CBCT, has recently been proposed and tested for particle therapy dose calculation. The SCA relies on subtraction of digitally reconstructed radiographs (DRR) from scaled measured projections and smoothing operations, followed by a subtraction correction and reconstruction. In this note, we compared the SCA’s correction to one based on a Monte Carlo simulation of the scatter, and a separate beam hardening correction. Agreement better than 3% between the two approaches was obtained when comparing corrected log-transformed projections. Keywords: CBCT, Scatter, Monte Carlo, Beam hardening, Proton therapy |
| first_indexed | 2024-12-13T04:41:22Z |
| format | Article |
| id | doaj.art-f096c335729c4d2a9b7c7d8fe1d974cb |
| institution | Directory Open Access Journal |
| issn | 2405-6316 |
| language | English |
| last_indexed | 2024-12-13T04:41:22Z |
| publishDate | 2017-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics and Imaging in Radiation Oncology |
| spelling | doaj.art-f096c335729c4d2a9b7c7d8fe1d974cb2022-12-21T23:59:18ZengElsevierPhysics and Imaging in Radiation Oncology2405-63162017-07-0134952Decomposing a prior-CT-based cone-beam CT projection correction algorithm into scatter and beam hardening componentsChristoph Zöllner0Simon Rit1Christopher Kurz2Gloria Vilches-Freixas3Florian Kamp4George Dedes5Claus Belka6Katia Parodi7Guillaume Landry8Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München (LMU Munich), Am Coulombwall 1, 85748 Garching, GermanyUniv Lyon, INSA‐Lyon, Université Claude Bernard Lyon 1, UJM-Saint Étienne, CNRS, Inserm, CREATIS UMR 5220, U1206, Centre Léon Bérard, F‐69373 Lyon, FranceDepartment of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München (LMU Munich), Am Coulombwall 1, 85748 Garching, Germany; Department of Radiation Oncology, University Hospital, LMU Munich, Munich, Germany; German Cancer Consortium (DKTK), Munich, GermanyUniv Lyon, INSA‐Lyon, Université Claude Bernard Lyon 1, UJM-Saint Étienne, CNRS, Inserm, CREATIS UMR 5220, U1206, Centre Léon Bérard, F‐69373 Lyon, FranceDepartment of Radiation Oncology, University Hospital, LMU Munich, Munich, Germany; German Cancer Consortium (DKTK), Munich, GermanyDepartment of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München (LMU Munich), Am Coulombwall 1, 85748 Garching, GermanyDepartment of Radiation Oncology, University Hospital, LMU Munich, Munich, Germany; German Cancer Consortium (DKTK), Munich, GermanyDepartment of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München (LMU Munich), Am Coulombwall 1, 85748 Garching, GermanyDepartment of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München (LMU Munich), Am Coulombwall 1, 85748 Garching, Germany; Corresponding author.A scatter correction algorithm (SCA) for cone beam CT (CBCT) projections, making use of prior information obtained by deformable image registration of CT to CBCT, has recently been proposed and tested for particle therapy dose calculation. The SCA relies on subtraction of digitally reconstructed radiographs (DRR) from scaled measured projections and smoothing operations, followed by a subtraction correction and reconstruction. In this note, we compared the SCA’s correction to one based on a Monte Carlo simulation of the scatter, and a separate beam hardening correction. Agreement better than 3% between the two approaches was obtained when comparing corrected log-transformed projections. Keywords: CBCT, Scatter, Monte Carlo, Beam hardening, Proton therapyhttp://www.sciencedirect.com/science/article/pii/S2405631617300064 |
| spellingShingle | Christoph Zöllner Simon Rit Christopher Kurz Gloria Vilches-Freixas Florian Kamp George Dedes Claus Belka Katia Parodi Guillaume Landry Decomposing a prior-CT-based cone-beam CT projection correction algorithm into scatter and beam hardening components Physics and Imaging in Radiation Oncology |
| title | Decomposing a prior-CT-based cone-beam CT projection correction algorithm into scatter and beam hardening components |
| title_full | Decomposing a prior-CT-based cone-beam CT projection correction algorithm into scatter and beam hardening components |
| title_fullStr | Decomposing a prior-CT-based cone-beam CT projection correction algorithm into scatter and beam hardening components |
| title_full_unstemmed | Decomposing a prior-CT-based cone-beam CT projection correction algorithm into scatter and beam hardening components |
| title_short | Decomposing a prior-CT-based cone-beam CT projection correction algorithm into scatter and beam hardening components |
| title_sort | decomposing a prior ct based cone beam ct projection correction algorithm into scatter and beam hardening components |
| url | http://www.sciencedirect.com/science/article/pii/S2405631617300064 |
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