神戸大学附属図書館デジタルアーカイブ
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https://hdl.handle.net/20.500.14094/0100483362
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2024-05-08
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0100483362 (fulltext)
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0100483362
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open access
出版タイプ
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タイトル
Comparative study of sub-second temporal resolution 4D-MRI and 4D-CT for target motion assessment in a phantom model
著者
Wang, Tianyuan ; Sofue, Keitaro ; Shimada, Ryuji ; Ishihara, Takeaki ; Yada, Ryuichi ; Miyamoto, Masanori ; Sasaki, Ryohei ; Murakami, Takamichi
著者名
Wang, Tianyuan
著者ID
A1469
研究者ID
1000090622027
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=f7fcd4a60d373990520e17560c007669
著者名
Sofue, Keitaro
祖父江, 慶太郎
ソフエ, ケイタロウ
所属機関名
医学部附属病院
著者名
Shimada, Ryuji
著者ID
A1502
研究者ID
1000010546477
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=200899dab15877cf520e17560c007669
著者名
Ishihara, Takeaki
石原, 武明
イシハラ, タケアキ
所属機関名
医学部附属病院
著者ID
A2249
研究者ID
1000050782421
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=c8d8c66aeab29c3d520e17560c007669
著者名
Yada, Ryuichi
矢田, 隆一
ヤダ, リュウイチ
所属機関名
医学部附属病院
著者名
Miyamoto, Masanori
著者ID
A1363
研究者ID
1000030346267
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=f5e9afd9968a7ac8520e17560c007669
著者名
Sasaki, Ryohei
佐々木, 良平
ササキ, リョウヘイ
所属機関名
医学部附属病院
著者ID
A2302
研究者ID
1000020252653
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail?systemId=4d5c2d2510f6d3a2520e17560c007669
著者名
Murakami, Takamichi
村上, 卓道
ムラカミ, タカミチ
所属機関名
医学研究科
収録物名
Scientific Reports
巻(号)
13(1)
ページ
15685
出版者
Nature Portfolio
刊行日
2023-09-21
公開日
2023-10-13
抄録
To develop and investigate the feasibility of sub-second temporal resolution volumetric T1-weighted four-dimensional (4D-) MRI in comparison with 4D-CT for respiratory-correlated motion assessment using an MRI/CT-compatible phantom. Sub-second high temporal resolution (0.5 s) gradient-echo T1-weighted 4D-MRI was developed using a volumetric acquisition scheme with compressed sensing. An MRI/CT-compatible motion phantom (simulated liver tumor) with three sinusoidal movements of amplitudes and two respiratory patterns was introduced and imaged with 4D-MRI and 4D-CT to investigate the geometric accuracy of the target movement. The geometric accuracy, including centroid position, volume, similarity index of dice similarity coefficient (DSC), and Hausdorff distance (HD), was systematically evaluated. Proposed 4D-MRI achieved a similar geometric accuracy compared with 4D-CT regarding the centroid position, volume, and similarity index. The observed position differences of the absolute average centroid were within 0.08 cm in 4D-MRI and 0.03 cm in 4D-CT, less than the 1-pixel resolution for each modality. The observed volume difference in 4D-MRI/4D-CT was within 0.73 cm³ (4.5%)/0.29 cm³ (2.1%) for a large target and 0.06 cm³ (11.3%)/0.04 cm³ (11.6%) for a small target. The observed DSC values for 4D-MRI/4D-CT were at least 0.93/0.95 for the large target and 0.83/0.84 for the small target. The maximum HD values were 0.25 cm/0.31 cm for the large target and 0.21 cm/0.15 cm for the small target. Although 4D-CT potentially exhibit superior numerical accuracy in phantom studies, the proposed high temporal resolution 4D-MRI demonstrates sub-millimetre geometric accuracy comparable to that of 4D-CT. These findings suggest that the 4D-MRI technique is a viable option for characterizing motion and generating phase-dependent internal target volumes within the realm of radiotherapy.
カテゴリ
医学研究科
医学部附属病院
学術雑誌論文
権利
© The Author(s) 2023.
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
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資源タイプ
journal article
言語
English (英語)
eISSN
2045-2322
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DOI
https://doi.org/10.1038/s41598-023-42773-z
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