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Digital reconstructed radiography with multiple color image overlay for image-guided radiotherapy

Registration of patient anatomical structures to the reference position is a basic part of the patient set-up procedure. Registration of anatomical structures between the site of beam entrance on the patient surface and the distal target position is particularly important. Here, to improve patient p...

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Autores principales: Yoshino, Shinichi, Miki, Kentaro, Sakata, Kozo, Nakayama, Yuko, Shibayama, Kouichi, Mori, Shinichiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4426926/
https://www.ncbi.nlm.nih.gov/pubmed/25678537
http://dx.doi.org/10.1093/jrr/rrv002
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author Yoshino, Shinichi
Miki, Kentaro
Sakata, Kozo
Nakayama, Yuko
Shibayama, Kouichi
Mori, Shinichiro
author_facet Yoshino, Shinichi
Miki, Kentaro
Sakata, Kozo
Nakayama, Yuko
Shibayama, Kouichi
Mori, Shinichiro
author_sort Yoshino, Shinichi
collection PubMed
description Registration of patient anatomical structures to the reference position is a basic part of the patient set-up procedure. Registration of anatomical structures between the site of beam entrance on the patient surface and the distal target position is particularly important. Here, to improve patient positional accuracy during set-up for particle beam treatment, we propose a new visualization methodology using digitally reconstructed radiographs (DRRs), overlaid DRRs, and evaluation of overlaid DRR images in clinical cases. The overlaid method overlays two DRR images in different colors by dividing the CT image into two CT sections at the distal edge of the target along the treatment beam direction. Since our hospital uses fixed beam ports, the treatment beam angles for this study were set at 0 and 90 degrees. The DRR calculation direction was from the X-ray tube to the imaging device, and set to 180/270 degrees and 135/225 degrees, based on the installation of our X-ray imaging system. Original and overlaid DRRs were calculated using CT data for two patients, one with a parotid gland tumor and the other with prostate cancer. The original and overlaid DRR images were compared. Since the overlaid DRR image was completely separated into two regions when the DRR calculation angle was the same as the treatment beam angle, the overlaid DRR visualization technique was able to provide rich information for aiding recognition of the relationship between anatomical structures and the target position. This method will also be useful in patient set-up procedures for fixed irradiation ports.
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spelling pubmed-44269262015-05-15 Digital reconstructed radiography with multiple color image overlay for image-guided radiotherapy Yoshino, Shinichi Miki, Kentaro Sakata, Kozo Nakayama, Yuko Shibayama, Kouichi Mori, Shinichiro J Radiat Res Short Communication Registration of patient anatomical structures to the reference position is a basic part of the patient set-up procedure. Registration of anatomical structures between the site of beam entrance on the patient surface and the distal target position is particularly important. Here, to improve patient positional accuracy during set-up for particle beam treatment, we propose a new visualization methodology using digitally reconstructed radiographs (DRRs), overlaid DRRs, and evaluation of overlaid DRR images in clinical cases. The overlaid method overlays two DRR images in different colors by dividing the CT image into two CT sections at the distal edge of the target along the treatment beam direction. Since our hospital uses fixed beam ports, the treatment beam angles for this study were set at 0 and 90 degrees. The DRR calculation direction was from the X-ray tube to the imaging device, and set to 180/270 degrees and 135/225 degrees, based on the installation of our X-ray imaging system. Original and overlaid DRRs were calculated using CT data for two patients, one with a parotid gland tumor and the other with prostate cancer. The original and overlaid DRR images were compared. Since the overlaid DRR image was completely separated into two regions when the DRR calculation angle was the same as the treatment beam angle, the overlaid DRR visualization technique was able to provide rich information for aiding recognition of the relationship between anatomical structures and the target position. This method will also be useful in patient set-up procedures for fixed irradiation ports. Oxford University Press 2015-05 2015-02-11 /pmc/articles/PMC4426926/ /pubmed/25678537 http://dx.doi.org/10.1093/jrr/rrv002 Text en © The Author 2015. Published by Oxford University Press on behalf of The Japan Radiation Research Society and Japanese Society for Radiation Oncology. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Short Communication
Yoshino, Shinichi
Miki, Kentaro
Sakata, Kozo
Nakayama, Yuko
Shibayama, Kouichi
Mori, Shinichiro
Digital reconstructed radiography with multiple color image overlay for image-guided radiotherapy
title Digital reconstructed radiography with multiple color image overlay for image-guided radiotherapy
title_full Digital reconstructed radiography with multiple color image overlay for image-guided radiotherapy
title_fullStr Digital reconstructed radiography with multiple color image overlay for image-guided radiotherapy
title_full_unstemmed Digital reconstructed radiography with multiple color image overlay for image-guided radiotherapy
title_short Digital reconstructed radiography with multiple color image overlay for image-guided radiotherapy
title_sort digital reconstructed radiography with multiple color image overlay for image-guided radiotherapy
topic Short Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4426926/
https://www.ncbi.nlm.nih.gov/pubmed/25678537
http://dx.doi.org/10.1093/jrr/rrv002
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