Patent ID: 7276909
Filing Date: 2007-10-02
Classification: G01R

Abstract:
1. An RF transmission method of using a magnetic field, the method comprising: generating a magnetic field in an MRI apparatus by inducing a current in an auxiliary birdcage-like coil which is radially interposed between a transmitter coil and a subject, with the auxiliary coil and the transmitter coil being separated from one another, wherein inducing a current within the auxiliary coil comprises transmitting RF pulses and relaying those transmitted RF pulses from the transmitter coil to the auxiliary coil by mutual inductance, without contact between the transmitter coil and the auxiliary coil such that only the auxiliary coil itself, directly excites the subject; and adjusting an impedance of the auxiliary coil such that in-phase currents will flow through the transmitter coil and the auxiliary coil respectively.