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Evaluation of the effects of motion mitigation strategies on respiration‐induced motion in each pancreatic region using cine‐magnetic resonance imaging
PURPOSE: This study aimed to quantify the respiration‐induced motion in each pancreatic region during motion mitigation strategies and to characterize the correlations between this motion and that of the surrogate signals in cine‐magnetic resonance imaging (MRI). We also aimed to evaluate the effect...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6753735/ https://www.ncbi.nlm.nih.gov/pubmed/31385418 http://dx.doi.org/10.1002/acm2.12693 |
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author | Fujimoto, Koya Shiinoki, Takehiro Yuasa, Yuki Onizuka, Ryota Yamane, Masatoshi |
author_facet | Fujimoto, Koya Shiinoki, Takehiro Yuasa, Yuki Onizuka, Ryota Yamane, Masatoshi |
author_sort | Fujimoto, Koya |
collection | PubMed |
description | PURPOSE: This study aimed to quantify the respiration‐induced motion in each pancreatic region during motion mitigation strategies and to characterize the correlations between this motion and that of the surrogate signals in cine‐magnetic resonance imaging (MRI). We also aimed to evaluate the effects of these motion mitigation strategies in each pancreatic region. METHODS: Sagittal and coronal two‐dimensional cine‐MR images were obtained in 11 healthy volunteers, eight of whom also underwent imaging with abdominal compression (AC). For each pancreatic region, the magnitude of pancreatic motion with and without motion mitigation and the positional error between the actual and predicted pancreas motion based on surrogate signals were evaluated. RESULTS: The magnitude of pancreatic motion with and without AC in the left–right (LR) and superior–inferior (SI) directions varied depending on the pancreatic region. In respiratory gating (RG) assessments based on a surrogate signal, although the correlation was reasonable, the positional error was large in the pancreatic tail region. Furthermore, motion mitigation in the anterior‐posterior and SI directions with RG was more effective than was that with AC in the head region. CONCLUSIONS: This study revealed pancreatic region‐dependent variations in respiration‐induced motion and their effects on motion mitigation outcomes during AC or RG. The magnitude of pancreatic motion with or without AC and the magnitude of the positional error with RG varied depending on the pancreatic region. Therefore, during radiation therapy for pancreatic cancer, it is important to consider that the effects of motion mitigation during AC or RG may differ depending on the pancreatic region. |
format | Online Article Text |
id | pubmed-6753735 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-67537352019-09-23 Evaluation of the effects of motion mitigation strategies on respiration‐induced motion in each pancreatic region using cine‐magnetic resonance imaging Fujimoto, Koya Shiinoki, Takehiro Yuasa, Yuki Onizuka, Ryota Yamane, Masatoshi J Appl Clin Med Phys Radiation Oncology Physics PURPOSE: This study aimed to quantify the respiration‐induced motion in each pancreatic region during motion mitigation strategies and to characterize the correlations between this motion and that of the surrogate signals in cine‐magnetic resonance imaging (MRI). We also aimed to evaluate the effects of these motion mitigation strategies in each pancreatic region. METHODS: Sagittal and coronal two‐dimensional cine‐MR images were obtained in 11 healthy volunteers, eight of whom also underwent imaging with abdominal compression (AC). For each pancreatic region, the magnitude of pancreatic motion with and without motion mitigation and the positional error between the actual and predicted pancreas motion based on surrogate signals were evaluated. RESULTS: The magnitude of pancreatic motion with and without AC in the left–right (LR) and superior–inferior (SI) directions varied depending on the pancreatic region. In respiratory gating (RG) assessments based on a surrogate signal, although the correlation was reasonable, the positional error was large in the pancreatic tail region. Furthermore, motion mitigation in the anterior‐posterior and SI directions with RG was more effective than was that with AC in the head region. CONCLUSIONS: This study revealed pancreatic region‐dependent variations in respiration‐induced motion and their effects on motion mitigation outcomes during AC or RG. The magnitude of pancreatic motion with or without AC and the magnitude of the positional error with RG varied depending on the pancreatic region. Therefore, during radiation therapy for pancreatic cancer, it is important to consider that the effects of motion mitigation during AC or RG may differ depending on the pancreatic region. John Wiley and Sons Inc. 2019-08-05 /pmc/articles/PMC6753735/ /pubmed/31385418 http://dx.doi.org/10.1002/acm2.12693 Text en © 2019 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Radiation Oncology Physics Fujimoto, Koya Shiinoki, Takehiro Yuasa, Yuki Onizuka, Ryota Yamane, Masatoshi Evaluation of the effects of motion mitigation strategies on respiration‐induced motion in each pancreatic region using cine‐magnetic resonance imaging |
title | Evaluation of the effects of motion mitigation strategies on respiration‐induced motion in each pancreatic region using cine‐magnetic resonance imaging |
title_full | Evaluation of the effects of motion mitigation strategies on respiration‐induced motion in each pancreatic region using cine‐magnetic resonance imaging |
title_fullStr | Evaluation of the effects of motion mitigation strategies on respiration‐induced motion in each pancreatic region using cine‐magnetic resonance imaging |
title_full_unstemmed | Evaluation of the effects of motion mitigation strategies on respiration‐induced motion in each pancreatic region using cine‐magnetic resonance imaging |
title_short | Evaluation of the effects of motion mitigation strategies on respiration‐induced motion in each pancreatic region using cine‐magnetic resonance imaging |
title_sort | evaluation of the effects of motion mitigation strategies on respiration‐induced motion in each pancreatic region using cine‐magnetic resonance imaging |
topic | Radiation Oncology Physics |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6753735/ https://www.ncbi.nlm.nih.gov/pubmed/31385418 http://dx.doi.org/10.1002/acm2.12693 |
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