| 摘要 |
PCT No. PCT/JP92/01333 Sec. 371 Date Apr. 4, 1994 Sec. 102(e) Date Apr. 4, 1994 PCT Filed Oct. 13, 1992 PCT Pub. No. WO93/07805 PCT Pub. Date Apr. 19, 1993.This invention provides an RF drive circuit of MR apparatus capable of controlling the drive voltage of the RF coil, inclusive of the correction of the quadrature balance. The RF drive circuit for quadratically driving the RF coil of MR apparatus comprises a voltage monitor means for monitoring the voltages on the 0 DEG -port and 90 DEG -port of the RF coil, a feedback voltage generation means for producing, from the monitored voltages on the 0 DEG -port and 90 DEG -port, a feedback voltage that corresponds to a component of a revolving magnetic field formed in the RF coil, with the magnetic field component being in the field revolving direction and coupling with a spin system, and a drive voltage control means for controlling, based on the feedback voltage, the drive voltage to be applied to the RF coil.
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