| Presentation | 2015-07-18 Optimization of receiver system for ultra-low field MRI with optically pumped atomic magnetometer Tetsuya Yamamoto, Takenori Oida, Tetsuo Kobayashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, ultra-low field (ULF) magnetic resonance imaging (MRI) has attracted attention. However, due to the low resonant frequency of magnetic resonant signals in ULF-MRI, signal detection with conventional receiver coils is very difficult. Therefore, it is necessary to increase voltage induced on a coil by winding more wire and selectively amplify the voltage by configuring an LC parallel resonant circuit tuned to the resonant frequency. In general, the circuit is matched to the characteristic impedance of a cable. The matching is, however, negligible in the low frequency range, since the wavelength of MR signal is over several kilometers. In addition, use of hyperpolarized Xe as a sample is helpful to increase MR signals, since nuclear spin polarizationis small in ULF-MRI . To verify these predictions, we carried out simulations to determine an optimal receiver coil and an LC parallel resonant circuit. This is beneficial for our development of an ULF-MRI with optically pumped atomic magnetometer as a sensor, in which remote detection of MR signals with the combination of a flux transformer is planned. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ultra-low field MRI / receiver coil / resonant circuit / hyperpolarized Xe / optically pumped atomic magnetometer |
| Paper # | MBE2015-21 |
| Date of Issue | 2015-07-11 (MBE) |
| Conference Information | |
| Committee | MBE / NC |
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| Conference Date | 2015/7/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | The University of Tokushima |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Me, general |
| 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 |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Optimization of receiver system for ultra-low field MRI with optically pumped atomic magnetometer |
| Sub Title (in English) | |
| Keyword(1) | ultra-low field MRI |
| Keyword(2) | receiver coil |
| Keyword(3) | resonant circuit |
| Keyword(4) | hyperpolarized Xe |
| Keyword(5) | optically pumped atomic magnetometer |
| 1st Author's Name | Tetsuya Yamamoto |
| 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 | Tetsuo Kobayashi |
| 3rd Author's Affiliation | Kyoto University(Kyoto Univ.) |
| Date | 2015-07-18 |
| Paper # | MBE2015-21 |
| Volume (vol) | vol.115 |
| Number (no) | MBE-147 |
| Page | pp.pp.7-12(MBE), |
| #Pages | 6 |
| Date of Issue | 2015-07-11 (MBE) |