| Item type |
itemtype_ver1(1) |
| 公開日 |
2023-08-30 |
| タイトル |
|
|
タイトル |
Urethral identification using three-dimensional magnetic resonance imaging and interfraction urethral motion evaluation for prostate stereotactic body radiotherapy |
|
言語 |
en |
| 著者 |
Kato, Yutaka
Okumiya, Shintaro
Okudaira, Kuniyasu
Ito, Junji
Kumagai, Motoki
Kamomae, Takeshi
Noguchi, Yumiko
Kawamura, Mariko
Ishihara, Shunichi
Naganawa, Shinji
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利 |
|
|
言語 |
en |
|
権利情報Resource |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
|
権利情報 |
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
prostatic urethra |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
catheter |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
magnetic resonance imaging |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
computed tomography |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
interfractional motion |
| 内容記述 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Prostatic urethra identification is crucial in prostate stereotactic body radiotherapy (SBRT) to reduce the risk of urinary toxicity. Although computed tomography (CT) with a catheter is commonly employed, it is invasive, and catheter placement may displace the urethral position, resulting in possible planning inaccuracies. However, magnetic resonance imaging (MRI) can overcome these weaknesses. Accurate urethral identification and minimal daily variation could ensure a highly accurate SBRT. In this study, we investigated the usefulness of a three-dimensional (3D) T2-weighted (T2W) sequence for urethral identification, and the interfractional motion of the prostatic urethra on CT with a catheter and MRI without a catheter for implementing noninvasive SBRT. Thirty-two patients were divided into three groups. The first group underwent MRI without a catheter to evaluate urethral identification by two-dimensional (2D)- and 3D-T2W sequences using mean slice-wise Hausdorff distance (MSHD) and Dice similarity coefficient (DSC) of the contouring by two operators and using visual assessment. The second group provided 3-day MRI data without a catheter using 3D-T2W, and the third provided 3-day CT data with a catheter to evaluate the interfractional motion using MSHD, DSC, and displacement distance (Dd). The MSHD and DSC for the interoperator variability in urethral identification and visual assessment were superior in 3D-T2W than in 2D-T2W. Regarding interfractional motion, the Dd value for prostatic urethra was smaller in MRI than in CT. These findings indicate that the 3D-T2W yielded adequate prostatic urethral identification, and catheter-free MRI resulted in less interfractional motion, suggesting that 3D-T2W MRI without a catheter is a feasible noninvasive approach to performing prostate SBRT. |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
Nagoya University Graduate School of Medicine, School of Medicine |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプresource |
http://purl.org/coar/resource_type/c_6501 |
|
タイプ |
departmental bulletin paper |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| ID登録 |
|
|
ID登録 |
10.18999/nagjms.85.3.504 |
|
ID登録タイプ |
JaLC |
| 関連情報 |
|
|
関連タイプ |
isVersionOf |
|
|
識別子タイプ |
URI |
|
|
関連識別子 |
https://www.med.nagoya-u.ac.jp/medlib/nagoya_j_med_sci/853.html |
| 助成情報 |
|
|
|
識別子タイプ |
Crossref Funder |
|
|
助成機関識別子 |
https://doi.org/10.13039/501100001691 |
|
|
助成機関名 |
日本学術振興会 |
|
|
言語 |
ja |
|
|
助成機関名 |
Japan Society for the Promotion of Science |
|
|
言語 |
en |
|
|
研究課題番号URI |
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21H04296/ |
|
|
研究課題番号 |
21H04296 |
|
|
研究課題名 |
前立腺がん放射線治療におけるカテーテル挿入に代わるMRIによる尿道同定の実現 |
|
|
言語 |
ja |
| 収録物識別子 |
|
|
収録物識別子タイプ |
PISSN |
|
収録物識別子 |
0027-7622 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
EISSN |
|
収録物識別子 |
2186-3326 |
| 書誌情報 |
en : Nagoya Journal of Medical Science
巻 85,
号 3,
p. 504-517,
発行日 2023-08
|
08_Kato.pdf (13.8 MB)
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