近接ジオメトリ型超高解像度CTの開発

Material type: 文書・図像類

Author: 川嶋, 広貴ほか

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Publication date: 2020-05-14

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Note (General)：: 金沢大学医薬保健研究域保健学系コンピュータ断層撮影(CT)の空間分解能は，主に検出器ピッチ，焦点サイズ，焦点－検出器間距離などの幾何学的配置によって決定される．そのため，臨床で使用されている汎用型CTの解像度は限られる．一方で四肢専用のCTは，高解像画像が得られるものの，撮像時間の延長やCT値精度の...

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https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17K16431/

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Material Type: 文書・図像類
Title: 近接ジオメトリ型超高解像度CTの開発
Author/Editor: 川嶋, 広貴
Kawashima, Hiroki
Author Heading: 川嶋, 広貴
Kawashima, Hiroki
Publication Date: 2020-05-14
Publication Date (W3CDTF): 2020-05-14
Alternative Title: Development of ultra-high-resolution CT with contact geometry
Periodical title: 令和1(2019)年度科学研究費補助金若手研究(B) 研究成果報告書 = 2019 Fiscal Year Final Research Report
No. or year of volume/issue: 2017-04-01 - 2020-03-31
Volume: 2017-04-01 - 2020-03-31
Pages: 7p.-
Text Language Code: jpn
Subject Heading: X線CT
高解像度
四肢
Radiation science
Target Audience: 一般
Note (General): 金沢大学医薬保健研究域保健学系
コンピュータ断層撮影(CT)の空間分解能は，主に検出器ピッチ，焦点サイズ，焦点－検出器間距離などの幾何学的配置によって決定される．そのため，臨床で使用されている汎用型CTの解像度は限られる．一方で四肢専用のCTは，高解像画像が得られるものの，撮像時間の延長やCT値精度の低下が懸念される．これらの問題を解決し，CTの解像度を飛躍的に改善するため，高精細検出器システムを既存のCT検出器の上に構築し，近接ジオメトリとした超高解像度CTシステムの基礎的技術を開発した．この高解像度CTは，汎用型CTと比べ，明らかに優れた画質特性を示し，骨梁など微細構造を明瞭に描出することができる．
The spatial resolution of a CT system is predominantly determined by the scanner’s geometric design including detector pitch, focal spot size, focus-isocenter distance, and focus-detector distance. Therefore, a conventional CT, which is now clinically available, has a limited resolution. On the other hand, although a micro CT significantly improved the resolution, extension of the scanning time and in-accurate CT number were concerns. In order to improve the spatial resolution and overcome these shortcomings, we developed an ultrahigh-resolution (UHR) CT system constructed by adding a high-resolution CMOS detector with a 0.1-mm pixel pitch to a 16-row multislice CT scanner. This UHR-CT with contact geometry showed superior performance than conventional CT. It is expected that fine anatomical structures of bones and inner ear, which have not been sufficiently visualized by conventional CT scanners, can be clearly visualized by this system.
研究課題/領域番号:17K16431, 研究期間(年度):2017-04-01 - 2020-03-31
出典：「近接ジオメトリ型超高解像度CTの開発」研究成果報告書　課題番号17K16431 (KAKEN：科学研究費助成事業データベース（国立情報学研究所））（https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-17K16431/17K16431seika/)を加工して作成
DOI: 10.24517/00057548
Access Restrictions: 限定公開
Related Material: https://kaken.nii.ac.jp/search/?qm=70775577
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17K16431/
https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-17K16431/17K16431seika/
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 金沢大学 : 金沢大学学術情報リポジトリKURA