- 专利标题: INTEGRATED ACTIVE DETUNING FOR MAGNETIC RESONANCE IMAGING
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申请号: US17362005申请日: 2021-06-29
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公开(公告)号: US20210325490A1公开(公告)日: 2021-10-21
- 发明人: Ian Robert Oliphant CONNELL
- 申请人: Synaptive Medical Inc.
- 申请人地址: CA Toronto
- 专利权人: Synaptive Medical Inc.
- 当前专利权人: Synaptive Medical Inc.
- 当前专利权人地址: CA Toronto
- 主分类号: G01R33/36
- IPC分类号: G01R33/36 ; G01R33/34
摘要:
A coil assembly includes: a radio frequency (RF) coil operable to be placed over a portion of a subject; a quarter-wave transformer coupled to the RF coil and configured to transform a characteristic impedance of the RF coil; and a diode placed behind the quarter-wave transformer and away from the RF coil, wherein the diode is operable to: (i) when the diode is forward biased, the diode turns the quarter-wave transformer into an open circuit such that the power amplifier drives the RF coil with sufficient electrical power for the RF coil to transmit an RF pulse into the portion of the subject; and (ii) when the diode is provided zero or revers bias, the diode turns the quarter-wave transformer into a short circuit such that the RF coil is detuned from a Lamor frequency of nuclei of interest immersed in the main magnet.