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Miyahara, Kanae Radiological Technology, Graduate School of Health Sciences, Okayama University
Kuroda, Masahiro Radiological Technology, Graduate School of Health Sciences, Okayama University
Yoshimura, Yuuki Radiological Technology, Graduate School of Health Sciences, Okayama University
Aoyama, Hideki Central Division of Radiology, Okayama University Hospital
Oita, Masataka Radiological Technology, Graduate School of Health Sciences, Okayama University
Sugianto, Irfan Department of Oral and Maxillofacial Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Matsuzaki, Hidenobu Department of Oral and Maxillofacial Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Ihara, Hiroki Department of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Katayama, Norihisa Department of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Katsui, Kuniaki Department of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Kanazawa, Susumu Department of Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Asaumi, Junichi Department of Oral and Maxillofacial Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
Abstract
We used image-processing software to analyze the setup errors at the skin surface position of breast cancer patients (n=66) who underwent post-operative whole breast irradiation at our hospital in 2014-2015. The sixty-six digital reconstructed radiographs (DRR) were created at the treatment planning for each patient. The lineacgraphies (n=377) were taken after the patients’ setup during radiotherapy. The lineacgraphies and DRR were superimposed at the skin surface position for each patient with the image-processing software. We measured the deviations of the isocenters for the nipple-lung (X) direction and craniocaudal (Y) direction and the deviation of the rotation angle of the XY axes between the lineacgraphy and DRR on the superimposed images. The systematic error (μ, Σ) and random error (σ) were calculated from the X and Y deviations and rotation angle deviation. The μ of X, Y, and rotation angle were 0.01 mm, −1.2 mm, and 0.05°, respectively. The Σ of X, Y, and rotation angle were 1.8 mm, 1.5 mm, and 0.9°, respectively. The σ of X, Y, and rotation angle were 2.0 mm, 1.5 mm, and 1.0°, respectively. Our analyses thus revealed that evaluations using image-processing software at the skin surface position in routine breast radiotherapy result in sufficiently small setup errors.
Keywords
breast cancer
radiotherapy
position verification
skin surface
image processing software
Amo Type
Original Article
Published Date
2018-08
Publication Title
Acta Medica Okayama
Volume
volume72
Issue
issue4
Publisher
Okayama University Medical School
Start Page
331
End Page
336
ISSN
0386-300X
NCID
AA00508441
Content Type
Journal Article
language
英語
Copyright Holders
CopyrightⒸ 2018 by Okayama University Medical School
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publisher
Refereed
True
PubMed ID