| Presentation | 2015-12-19 MR signal detection of hyperpolarized xenon with atomic magnetometers in ultra-low field based on SWIFT approach Yuki Kaga, Takenori Oida, Tetsuya Yamamoto, Tetsuo Kobayashi, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In recent years, ultra-low field MRI (ULF-MRI) has been attracting attention because of its advantages such as low maintenance cost. In ULF-MRI, however, there is a limitation that MR signals become very small in general. Hence, we have tried to visualize hyperpolarized xenon to detect MR signals than those of proton. In addition, MR signals of hyperpolarized xenon decay rapidly when a large gradient field is used in MR signal detection. Meanwhile, the sweep imaging with Fourier transformation (SWIFT) approach has been applied to reduce the decay caused by the diffusion of xenon gas. In this study, we employed an optically pumped atomic magnetometer (OPAM) with a flux transformer (FT) for remote detection of MR signals. In this system, we examined the constraints on the bandwidth of the MR signals measurement. In addition, we simulated signal acquisition and reconstruction from the MR signals in ULF-MRI obtained by the SWIFT approach when the bandwidth was changed. As a result, we could confirm that $T_2$ relaxation and narrow inter-pixel bandwidth contributes causes aliasing of the reconstructed image for imaging of hyperpolarized xenon with SWIFT approach in ULF-MRI. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ultra-low field MRI / hyperpolarized xenon, sweep imaging with Fourier transformation (SWIFT) / optically pumped atomic magnetometer (OPAM) / flux transformer (FT) |
| Paper # | MBE2015-80 |
| Date of Issue | 2015-12-12 (MBE) |
| Conference Information | |
| Committee | MBE / NC |
|---|---|
| Conference Date | 2015/12/19(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagoya Institute of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Tetsuo Kobayashi(Kyoto Univ.) / Toshimichi Saito(Hosei Univ.) |
| Vice Chair | Yutaka Fukuoka(Kogakuin Univ.) / Shigeo Sato(Tohoku Univ.) |
| Secretary | Yutaka Fukuoka(akita noken) / Shigeo Sato(Kogakuin Univ.) |
| Assistant | Takenori Oida(Kyoto Univ.) / Ryota Horie(Shibaura Inst. of Tech.) / Hiroyuki Kanbara(Tokyo Inst. of Tech.) / Hisanao Akima(Tohoku Univ.) |
| Paper Information | |
| Registration To | Technical Committee on ME and Bio Cybernetics / Technical Committee on Neurocomputing |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | MR signal detection of hyperpolarized xenon with atomic magnetometers in ultra-low field based on SWIFT approach |
| Sub Title (in English) | * |
| Keyword(1) | ultra-low field MRI |
| Keyword(2) | hyperpolarized xenon, sweep imaging with Fourier transformation (SWIFT) |
| Keyword(3) | optically pumped atomic magnetometer (OPAM) |
| Keyword(4) | flux transformer (FT) |
| 1st Author's Name | Yuki Kaga |
| 1st Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 2nd Author's Name | Takenori Oida |
| 2nd Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 3rd Author's Name | Tetsuya Yamamoto |
| 3rd Author's Affiliation | Kyoto University(Kyoto Univ.) |
| 4th Author's Name | Tetsuo Kobayashi |
| 4th Author's Affiliation | Kyoto University(Kyoto Univ.) |
| Date | 2015-12-19 |
| Paper # | MBE2015-80 |
| Volume (vol) | vol.115 |
| Number (no) | MBE-383 |
| Page | pp.pp.101-106(MBE), |
| #Pages | 6 |
| Date of Issue | 2015-12-12 (MBE) |