| Presentation | 2019-11-05 [Short Paper] Proposal of fault-tolerant CT image reconstruction using Nonlocal Total Variation and its application to metal artifact reduction Kazuki Chigita, Jian Dong, Yongchae Kim, Hiroyuki Kudo, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | When some abnormal data is included in the projection data, the normal image reconstruction method increases the influence of the abnormal data on the whole image and generates strong artifacts. We have proposed a fault-tolerant CT reconstruction method that automatically estimates and removes the location of abnormal data in the projection data and reconstructs the image. In this method, $L^1$ norm was used for the data term and Total Variation (TV) was used for the regularization term. However, there have been problems such as the tendency of Staircase artifacts to occur in images due to the use of TV as a regularization term, and the loss of smooth density conversion. In this study, we propose a new fault-tolerant image reconstruction method that improves the image quality performance by using Nonlocal TV. In this study, we perform simulation experiments assuming removal of metal artifacts and show the effectiveness of the proposed method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | CT image reconstruction / Metal artifact reduction / Nonlocal TV / fault-tolerant CT reconstruction |
| Paper # | MICT2019-37,MI2019-64 |
| Date of Issue | 2019-10-29 (MICT, MI) |
| Conference Information | |
| Committee | MI / MICT |
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| Conference Date | 2019/11/5(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Univ. of Tsukuba |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Medical imaging technology, healthcare and medical information communication technology |
| Chair | Yoshiki Kawata(Tokushima Univ.) / Shinsuke Hara(Osaka City Univ.) |
| Vice Chair | Takayuki Kitasaka(Aichi Inst. of Tech.) / Hidekata Hontani(Nagoya Inst. of Tech.) / Eisuke Hanada(Saga Univ.) / Chika Sugimoto(Yokohama National Univ.) |
| Secretary | Takayuki Kitasaka(Yamaguchi Univ.) / Hidekata Hontani(Univ. of Hyogo) / Eisuke Hanada(Nagoya Inst. of Tech.) / Chika Sugimoto(Kobe Univ.) |
| Assistant | Hotaka Takizawa(Tsukuba Univ.) / Yoshito Otake(NAIST) / Takumi Kobayashi(Yokohama National Univ.) / Keita Saku(Kyushu Univ.) / Kai Ishida(NICT) / Kento Takabayashi(Okayama Pref. Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Medical Imaging / Technical Committee on Healthcare and Medical Information Communication Technology |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Short Paper] Proposal of fault-tolerant CT image reconstruction using Nonlocal Total Variation and its application to metal artifact reduction |
| Sub Title (in English) | |
| Keyword(1) | CT image reconstruction |
| Keyword(2) | Metal artifact reduction |
| Keyword(3) | Nonlocal TV |
| Keyword(4) | fault-tolerant CT reconstruction |
| 1st Author's Name | Kazuki Chigita |
| 1st Author's Affiliation | University of Tsukuba(Univ. Tsukuba) |
| 2nd Author's Name | Jian Dong |
| 2nd Author's Affiliation | Tianjin University of Technology and Education(TUTE) |
| 3rd Author's Name | Yongchae Kim |
| 3rd Author's Affiliation | University of Tsukuba(Univ. Tsukuba) |
| 4th Author's Name | Hiroyuki Kudo |
| 4th Author's Affiliation | University of Tsukuba(Univ. Tsukuba) |
| Date | 2019-11-05 |
| Paper # | MICT2019-37,MI2019-64 |
| Volume (vol) | vol.119 |
| Number (no) | MICT-263,MI-264 |
| Page | pp.pp.55-56(MICT), pp.55-56(MI), |
| #Pages | 2 |
| Date of Issue | 2019-10-29 (MICT, MI) |