JP2015058009A5 - - Google Patents
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- JP2015058009A5 JP2015058009A5 JP2013191262A JP2013191262A JP2015058009A5 JP 2015058009 A5 JP2015058009 A5 JP 2015058009A5 JP 2013191262 A JP2013191262 A JP 2013191262A JP 2013191262 A JP2013191262 A JP 2013191262A JP 2015058009 A5 JP2015058009 A5 JP 2015058009A5
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- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000002595 magnetic resonance imaging Methods 0.000 claims 17
- 230000003321 amplification Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 230000003068 static Effects 0.000 claims 1
Description
上記課題を解決するために本発明のMRI装置は、位相変調されたRFパルス波形のデジタルデータをチャンネル毎に生成する多チャンネルデジタル波形生成部と、多チャンネルデジタル波形生成部でチャンネル毎に生成されたデジタル波形データをチャンネル毎にアナログ信号に変換してアナログRFパルスを出力する多チャンネルアナログ波形生成部と、チャンネル毎に位相の調整可能にRFパルスをそれぞれ生成する多チャンネルRF送信部を備える。そして、多チャンネルアナログ波形生成部は、アナログRFパルスの位相と振幅の内の少なくとも一方を調整する調整部をチャンネル毎に備えていることを特徴とする。
In order to solve the above problems, the MRI apparatus of the present invention is generated for each channel by a multi-channel digital waveform generation unit that generates digital data of a phase-modulated RF pulse waveform for each channel and a multi-channel digital waveform generation unit. the digital waveform data is converted for each channel into an analog signal comprises a multi-channel analog waveform generator for outputting an analog RF pulse, a multi-channel RF transmission unit for generating each for each switch Yan'neru phase adjustable RF pulses were . The multi-channel analog waveform generation unit includes an adjustment unit for adjusting at least one of the phase and amplitude of the analog RF pulse for each channel.
Claims (9)
前記多チャンネルデジタル波形生成部でチャンネル毎に生成されたデジタル波形データをチャンネル毎にアナログ信号に変換してアナログＲＦパルスを出力する多チャンネルアナログ波形生成部と、
チャンネル毎に位相の調整可能に前記アナログＲＦパルスをそれぞれ生成する多チャンネルＲＦ送信部とを備えていることを特徴とする磁気共鳴イメージング装置。 A multi-channel digital waveform generator for generating digital data of a phase-modulated RF pulse waveform for each channel;
A multi-channel analog waveform generation unit that converts the digital waveform data generated for each channel by the multi-channel digital waveform generation unit into an analog signal for each channel and outputs an analog RF pulse;
Magnetic resonance imaging apparatus characterized by comprising a multi-channel RF transmission unit for generating each for each switch Yan'neru phase adjustably the analog RF pulse.
前記多チャンネルアナログ波形生成部は、前記デジタル波形データから変換されたアナログ信号を振幅変調する可変増幅部をチャンネル毎に備えていることを特徴とする磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 1.
The magnetic resonance imaging apparatus according to claim 1, wherein the multi-channel analog waveform generation unit includes a variable amplification unit for amplitude-modulating an analog signal converted from the digital waveform data for each channel.
前記多チャンネルデジタル波形生成部は、位相変調された低周波デジタルサイン波形データと、デジタルＳＩＮＣ波形データとから、低周波デジタルＳＩＮＣ波形データを前記ＲＦパルス波形のデジタルデータとしてチャンネル毎に生成することを特徴する磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 1 or 2,
The multi-channel digital waveform generator generates low frequency digital SINC waveform data for each channel as digital data of the RF pulse waveform from phase-modulated low frequency digital sine waveform data and digital SINC waveform data. Characteristic magnetic resonance imaging apparatus.
前記多チャンネルアナログ波形生成部は、前記多チャンネルデジタル波形生成部から前記低周波デジタルＳＩＮＣ波形データをアナログ低周波ＳＩＮＣ波にチャンネル毎に変換し、該チャンネル毎のアナログ低周波ＳＩＮＣ波を静磁場強度で定まる所定の高周波アナログＳＩＮＣ波に変換することを特徴とする磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 3.
The multi-channel analog waveform generator, said the multi-channel digital waveform generator converts the low-frequency digital SINC waveform data for each channel in analog low-frequency SINC waves, static magnetic field strength an analog low-frequency SINC wave for each said channel A magnetic resonance imaging apparatus characterized by converting to a predetermined high-frequency analog SINC wave determined by:
前記多チャンネルアナログ波形生成部は、前記アナログＲＦパルスの位相と振幅の内の少なくとも一方を調整する調整部をチャンネル毎に備えていることを特徴とする磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to any one of claims 1 to 4,
The magnetic resonance imaging apparatus, wherein the multi-channel analog waveform generation unit includes an adjustment unit for adjusting at least one of a phase and an amplitude of the analog RF pulse for each channel.
前記調整部は、デジタルポテンショメータ又はデジタル可変キャパシタを有する位相調整回路をチャンネル毎に備えていることを特徴とする磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 5.
The magnetic resonance imaging apparatus, wherein the adjustment unit includes a phase adjustment circuit having a digital potentiometer or a digital variable capacitor for each channel.
前記調整部は、デジタル可変抵抗を有する振幅調整回路をチャンネル毎に備えていることを特徴とする磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 5.
The magnetic resonance imaging apparatus, wherein the adjustment unit includes an amplitude adjustment circuit having a digital variable resistor for each channel.
前記調整部の調整パラメータをチャンネル毎に変更可能な調整ＧＵＩを表示する表示部を備えていることを特徴とする磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 5.
A magnetic resonance imaging apparatus, comprising: a display unit that displays an adjustment GUI capable of changing an adjustment parameter of the adjustment unit for each channel.
前記調整部の調整パラメータの調整を外部から受け付けるための接続部を備えていることを特徴とする磁気共鳴イメージング装置。 The magnetic resonance imaging apparatus according to claim 5.
A magnetic resonance imaging apparatus comprising: a connection unit for accepting adjustment parameters of the adjustment unit from outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013191262A JP2015058009A (en) | 2013-09-17 | 2013-09-17 | Magnetic resonance imaging apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013191262A JP2015058009A (en) | 2013-09-17 | 2013-09-17 | Magnetic resonance imaging apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2015058009A JP2015058009A (en) | 2015-03-30 |
| JP2015058009A5 true JP2015058009A5 (en) | 2016-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013191262A Pending JP2015058009A (en) | 2013-09-17 | 2013-09-17 | Magnetic resonance imaging apparatus |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101836338B1 (en) * | 2016-10-31 | 2018-03-08 | 가천대학교 산학협력단 | Multi-stage power amplification of magnetic resonance imaging and controlling method thereof |
| CN106510711A (en) * | 2016-11-09 | 2017-03-22 | 北京化工大学 | Radio-frequency emission device and method for high field magnetic resonance imaging |
| JP7039190B2 (en) * | 2017-06-19 | 2022-03-22 | キヤノンメディカルシステムズ株式会社 | Magnetic resonance imaging device |
| CN109738839B (en) * | 2018-12-29 | 2021-04-27 | 佛山瑞加图医疗科技有限公司 | Radio frequency coil system applied to rotating magnetic resonance |
| CN111707975B (en) * | 2020-06-24 | 2022-09-02 | 中国电子科技集团公司第四十一研究所 | Radio frequency signal generation system and method suitable for helium optical pump magnetometer |
| CN112327232B (en) * | 2020-10-30 | 2022-03-08 | 中国科学院精密测量科学与技术创新研究院 | Multi-core multichannel nuclear magnetic resonance radio frequency link real-time switching control device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3884244B2 (en) * | 2001-07-04 | 2007-02-21 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | RF transmission circuit and MRI apparatus |
| KR20060090241A (en) * | 2003-10-03 | 2006-08-10 | 리전츠 오브 더 유니버스티 오브 미네소타 | Parallel transceiver for nuclear magnetic resonance system |
| US8035382B2 (en) * | 2004-11-23 | 2011-10-11 | m2m Imaging Corporation | Coil decoupling in magnetic resonance imaging |
| JP2010525855A (en) * | 2007-05-04 | 2010-07-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | RF transmitter with digital feedback on MRI |
| JP2011019565A (en) * | 2009-07-13 | 2011-02-03 | Toshiba Corp | Magnetic resonance imaging apparatus and rf coil |
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