| Presentation | 2019-03-14 [Poster Presentation] MR Image Reconstruction Using Two Types of Dictionaries and the Diagonalization of a BCCB Matrix Kazuma Nakamoto, Kosuke Fujii, Daichi Kitahara, Akira Hirabayashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We propose a high-quality MR image reconstruction method using both of an adaptive orthogonal dictionary and a pre-trained redundant dictionary. The adaptive dictionary exploits the orthogonality to accelerate the reconstruction speed, and the pre-trained dictionary adopts the redundancy to precisely reconstruct high-frequency components of the magnitude image. The image reconstruction process is further accelerated by using the so-called BCCB (Block Circulant with Circulant Blocks) structure of a matrix, which appears in the process. Simulations using real data demonstrate the effectiveness of the proposed method by comparison to conventional methods. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | High-Speed MRI / Image Reconstruction / Dictionary Learning / Compressed Sensing |
| Paper # | EA2018-112,SIP2018-118,SP2018-74 |
| Date of Issue | 2019-03-07 (EA, SIP, SP) |
| Conference Information | |
| Committee | EA / SIP / SP |
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| Conference Date | 2019/3/14(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | i+Land nagasaki (Nagasaki-shi) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Engineering/Electro Acoustics, Signal Processing, Speech, and Related Topics |
| Chair | Suehiro Shimauchi(Kanazawa Inst. of Tech.) / Shogo Muramatsu(Niigata Univ.) / Yoichi Yamashita(Ritsumeikan Univ.) |
| Vice Chair | Kenichi Furuya(Oita Univ.) / Kanji Watanabe(Akita Pref. Univ.) / Naoyuki Aikawa(TUS) / Kazunori Hayashi(Osaka City Univ) / Akinobu Ri(Nagoya Inst. of Tech.) |
| Secretary | Kenichi Furuya(Shizuoka Inst. of Science and Tech.) / Kanji Watanabe(NHK) / Naoyuki Aikawa(Takushoku Univ.) / Kazunori Hayashi(Hiroshima Univ.) / Akinobu Ri(Kyoto Univ.) |
| Assistant | Keisuke Imoto(Ritsumeikan Univ.) / Daisuke Morikawa(Toyama Pref Univ.) / Katsumi Konishi(Hosei Univ.) / hyihsin(Takushoku Univ.) / Tomoki Koriyama(Tokyo Inst. of Tech.) / Satoshi Kobashikawa(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Engineering Acoustics / Technical Committee on Signal Processing / Technical Committee on Speech |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Poster Presentation] MR Image Reconstruction Using Two Types of Dictionaries and the Diagonalization of a BCCB Matrix |
| Sub Title (in English) | |
| Keyword(1) | High-Speed MRI |
| Keyword(2) | Image Reconstruction |
| Keyword(3) | Dictionary Learning |
| Keyword(4) | Compressed Sensing |
| 1st Author's Name | Kazuma Nakamoto |
| 1st Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| 2nd Author's Name | Kosuke Fujii |
| 2nd Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| 3rd Author's Name | Daichi Kitahara |
| 3rd Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| 4th Author's Name | Akira Hirabayashi |
| 4th Author's Affiliation | Ritsumeikan University(Ritsumeikan Univ.) |
| Date | 2019-03-14 |
| Paper # | EA2018-112,SIP2018-118,SP2018-74 |
| Volume (vol) | vol.118 |
| Number (no) | EA-495,SIP-496,SP-497 |
| Page | pp.pp.75-80(EA), pp.75-80(SIP), pp.75-80(SP), |
| #Pages | 6 |
| Date of Issue | 2019-03-07 (EA, SIP, SP) |