| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2017-10-03 |
| タイトル |
|
|
タイトル |
Simulation approach for the evaluation of tracking accuracy in radiotherapy: A preliminary study |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
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|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| ID登録 |
|
|
ID登録 |
10.24517/00013456 |
|
ID登録タイプ |
JaLC |
| 著者 |
Tanaka, Rie
Ichikawa, Katsuhiro
Mori, Shinichiro
Sanada, Sigeru
|
| 著者別表示 |
田中, 利恵
市川, 勝弘
真田, 茂
|
| 書誌情報 |
Journal of Radiation Research
巻 54,
号 1,
p. 146-151,
発行日 2013-01-01
|
| ISSN |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0449-3060 |
| NCID |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA00705792 |
| DOI |
|
|
関連タイプ |
isVersionOf |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1093/jrr/rrs055 |
| 出版者 |
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|
出版者 |
The Japan Radiation Research Society and Japanese Society for Therapeutic Radiology and Oncology / Oxford University Press (OUP) |
| 内容記述 |
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|
内容記述タイプ |
Other |
|
内容記述 |
Real-time tumor tracking in external radiotherapy can be achieved by diagnostic (kV) X-ray imaging with a dynamic flat-panel detector (FPD). It is important to keep the patient dose as low as possible while maintaining tracking accuracy. A simulation approach would be helpful to optimize the imaging conditions. This study was performed to develop a computer simulation platform based on a noise property of the imaging system for the evaluation of tracking accuracy at any noise level. Flat-field images were obtained using a direct-type dynamic FPD, and noise power spectrum (NPS) analysis was performed. The relationship between incident quantum number and pixel value was addressed, and a conversion function was created. The pixel values were converted into a map of quantum number using the conversion function, and the map was then input into the random number generator to simulate image noise. Simulation images were provided at different noise levels by changing the incident quantum numbers. Subsequently, an implanted marker was tracked automatically and the maximum tracking errors were calculated at different noise levels. The results indicated that the maximum tracking error increased with decreasing incident quantum number in flat-field images with an implanted marker. In addition, the range of errors increased with decreasing incident quantum number. The present method could be used to determine the relationship between image noise and tracking accuracy. The results indicated that the simulation approach would aid in determining exposure dose conditions according to the necessary tracking accuracy. © The Author 2012. Published by Oxford University Press on behalf of The Japan Radiation Research Society and Japanese Society for Therapeutic Radiology and Oncology. |
| 著者版フラグ |
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|
出版タイプ |
AM |
|
出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| 関連URI |
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|
識別子タイプ |
URI |
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|
関連識別子 |
http://jrr.oxfordjournals.org/content/54/1/146 |
ME-PR-TANAKA-R-146.pdf (308.1 kB)
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