Patent ID: 6441615
Filing Date: 2002-08-27
Classification: G01R

Abstract:
A magnetic resonance apparatus which generates a temporally constant main magnetic field B0 between a pair of pole regions through an examination region, an RF transmitter which transmits radio frequency pulses to a quadrature radio frequency coil assembly to excite resonance in selected dipoles in the examination region such that the dipoles generate resonance signals at a characteristic resonance frequency, said quadrature radio frequency coil assembly receiving resonance signals from the resonating dipoles, at least one radio frequency receiver for demodulating the resonance signals received from the quadrature RF coil assembly, the quadrature RF coil assembly comprising:first RF ladder coil disposed in a plane transverse to the B0 field; and, a second RF ladder coil disposed in a parallel relationship to and adjacent the first RF ladder coil, the second RF ladder coil being rotated by 90Â° relative to the first RF ladder coil, the first and second ladder coils each including: at least five parallel legs; electrical conductive sides interconnecting ends of the legs; and at least one capacitive element interrupting at least one of the legs and sides.