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  1. 原著論文

A robustness analysis method with fast estimation of dose uncertainty distributions for carbon-ion therapy treatment planning

https://repo.qst.go.jp/records/48140
https://repo.qst.go.jp/records/48140
d03643ae-e2ff-4d2e-b887-d87d7cd3d16c
Item type 学術雑誌論文 / Journal Article(1)
公開日 2017-07-24
タイトル
タイトル A robustness analysis method with fast estimation of dose uncertainty distributions for carbon-ion therapy treatment planning
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 Sakama, Makoto

× Sakama, Makoto

WEKO 483402

Sakama, Makoto

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Kanematsu, Nobuyuki

× Kanematsu, Nobuyuki

WEKO 483403

Kanematsu, Nobuyuki

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Inaniwa, Taku

× Inaniwa, Taku

WEKO 483404

Inaniwa, Taku

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坂間 誠

× 坂間 誠

WEKO 483405

en 坂間 誠

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兼松 伸幸

× 兼松 伸幸

WEKO 483406

en 兼松 伸幸

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稲庭 拓

× 稲庭 拓

WEKO 483407

en 稲庭 拓

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抄録
内容記述タイプ Abstract
内容記述 A simple and efficient approach is needed for robustness evaluation and
optimization of treatment planning in routine clinical particle therapy. Here
we propose a robustness analysis method using dose standard deviation (SD)
in possible scenarios such as the robustness indicator and a fast dose warping
method, i.e. deformation of dose distributions, taking into account the setup
and range errors in carbon-ion therapy. The dose warping method is based on
the nominal dose distribution and the water-equivalent path length obtained
from planning computed tomography data with a clinically commissioned
treatment planning system (TPS). We compared, in a limited number
of scenarios at the extreme boundaries of the assumed error, the dose SD
distributions obtained by the warping method with those obtained using the
TPS dose recalculations. The accuracy of the warping method was examined
by the standard-deviation-volume histograms (SDVHs) for varying degrees
of setup and range errors for three different tumor sites. Furthermore, the
influence of dose fractionation on the combined dose uncertainty, taking into
consideration the correlation of setup and range errors between fractions, was
evaluated with simple equations using the SDVHs and the mean value of SDs in
the defined volume of interest. The results of the proposed method agreed well
with those obtained with the dose recalculations in these comparisons, and the
effectiveness of dose SD evaluations at the extreme boundaries of given errors
was confirmed from the responsivity and DVH analysis of relative SD values
for each error. The combined dose uncertainties depended heavily on the
number of fractions, assumed errors and tumor sites. The typical computation
time of the warping method is approximately 60 times less than that of the full dose calculation method using the TPS. The dose SD distributions and
SDVHs with the fractionation effect will be useful indicators for robustness
analysis in treatment planning, and the results of our comparative study show
that the proposed analysis method would be beneficial in routine clinical use.
書誌情報 Physics in Medicine & Biology

巻 61, 号 15, p. 5818-5836, 発行日 2016-07
出版者
出版者 IOP Publishing
ISSN
収録物識別子タイプ ISSN
収録物識別子 0031-9155
PubMed番号
識別子タイプ PMID
関連識別子 27426737
DOI
識別子タイプ DOI
関連識別子 10.1088/0031-9155/61/15/5818
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