| Presentation | 2019-11-05 [Short Paper] Evaluating image quality of nonlocal total variation and nonlocal means filter based Compressed Sensing in sparse-view CT Yongchae Kim, Katsuya Fujii, Hiroyuki Kudo, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | TV(Total Variation) is studied most widely in the field of X-ray CT image reconstruction. However, TV considers only adjacent pixels, the staircase artifacts appear in the reconstructed image. To avoid the staircase artifact problem, in 2016, Dong and Kudo proposed compressed sensing (NLF-CS) using a nonlocal means filter, which is one of the nonlinear filters, and showed that it had a significant image quality improvement. On the other hand, as an extended version of TV, nonlocal TV also exists to consider the difference of the pixel pair in the window. NLF-CS and nonlocal TV tend to generate similar reconstructed images but the two are mathematically different. They are often confused because there has been no research comparing image quality. In this paper, we discuss the image quality of NLF-CS and nonlocal TV in sparse-view CT. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Image reconstruction / Compressed sensing / Nonlocal Total Variation / Weighted median |
| Paper # | MICT2019-23,MI2019-50 |
| Date of Issue | 2019-10-29 (MICT, MI) |
| Conference Information | |
| Committee | MI / MICT |
|---|---|
| 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 |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Short Paper] Evaluating image quality of nonlocal total variation and nonlocal means filter based Compressed Sensing in sparse-view CT |
| Sub Title (in English) | |
| Keyword(1) | Image reconstruction |
| Keyword(2) | Compressed sensing |
| Keyword(3) | Nonlocal Total Variation |
| Keyword(4) | Weighted median |
| 1st Author's Name | Yongchae Kim |
| 1st Author's Affiliation | University of Tsukuba(Tsukuba Univ.) |
| 2nd Author's Name | Katsuya Fujii |
| 2nd Author's Affiliation | University of Tsukuba(Tsukuba Univ.) |
| 3rd Author's Name | Hiroyuki Kudo |
| 3rd Author's Affiliation | University of Tsukuba(Tsukuba Univ.) |
| Date | 2019-11-05 |
| Paper # | MICT2019-23,MI2019-50 |
| Volume (vol) | vol.119 |
| Number (no) | MICT-263,MI-264 |
| Page | pp.pp.1-4(MICT), pp.1-4(MI), |
| #Pages | 4 |
| Date of Issue | 2019-10-29 (MICT, MI) |