Improvement of the image quality and radiation dose reduction in dual-energy CT using iterative reconcstrucion
Project/Area Number |
26861016
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Radiation science
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Research Institution | Keio University |
Principal Investigator |
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Project Period (FY) |
2014-04-01 – 2017-03-31
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Project Status |
Completed (Fiscal Year 2016)
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Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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Keywords | CT / 2重エネルギー / dual energy / computed tomography / 逐次近似 / iterative reconstruction / 被ばく / radiation dose / iterative / image quality / 画質 / 画像再構成 / 被曝 |
Outline of Final Research Achievements |
(1) Compared with conventional filtered back projection technique, iterative reconstruction improved the image quality of virtual monochromatic images derived from dual-energy CT data. (2) Virtual monochromatic images (at 70 keV) derived from dual-energy CT data had a higher quantitative image quality and more accurate CT values compared with conventional 120-kVp images. (3) Excellent correlation was observed between the coronary artery calcium (CAC) scores on the virtual unenhanced images (derived from dual-energy CT data) and conventional (true) noncontrast images. Thus, dual-energy coronary CT angiography could allow prediction of the true CAC scores, potentially reducing the total radiation exposure and image acquisition time by obviating the need for true noncontrast CAC scoring CT.
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Report
(4 results)
Research Products
(14 results)
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[Journal Article] Comparison of the diagnostic accuracy of FBP, ASiR, and MBIR reconstruction during CT angiography in the evaluation of a vessel phantom with calcified stenosis in a distal superficial femoral artery in a cadaver extremity.2016
Author(s)
Tsukada J, Yamada M, Yamada Y, Yamazaki S, Imanishi N, Tamura K, Hashimoto M, Nakatsuka S, Jinzaki M.
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Journal Title
Medicine
Volume: 95
Issue: 27
Pages: e4127-e4127
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Advance in Cardiac CT2015
Author(s)
山田 祥岳, 山田 稔, 松本 俊亮, 鈴木 達也, 橋本 正弘, 岡村 哲平, 杉浦 弘明, 陣崎 雅弘
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Journal Title
呼吸と循環
Volume: 63
Issue: 12
Pages: 1199-1207
DOI
NAID
ISSN
0452-3458, 1882-1200
Year and Date
2015-12-15
Related Report
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[Presentation] FBP,ASiR,MBIR再構成の精度比較:献体下肢末梢血管内に留置した石灰化狭窄モデルにおける内腔精度評価.2015
Author(s)
塚田実郎, 山田稔, 山田祥岳, 山崎俊, 今西宣晶, 田村謙太郎, 橋本正弘, 岡村哲平, 中塚誠之, 陣崎雅弘.
Organizer
第81回日本心臓血管放射線研究会
Place of Presentation
北海道大学 学術交流会館 (北海道札幌市北区)
Year and Date
2015-07-04
Related Report
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