Patent ID: 6437567
Filing Date: 2002-08-20
Classification: G01R

Abstract:
A quadrature coil for operation at a radio frequency in an open MRI system, the MRI system having a polarizing magnet with opposed pole faces for establishing therebetween a polarizing field axis, the coil comprising,a first conductor array providing separated and substantially parallel conductor elements positioned along a first conductor axis extending across the polarizing field axis to opposed, common connection points; a second conductor array providing separated and substantially parallel conductor elements positioned along a second conductor axis extending across the polarizing field axis to opposed, connection points and substantially perpendicular to the first conductor elements; a combiner/splitter electrically communicating with a connection point of each of the first and second conductor arrays to join the connection points with a signal line so that a signal path between said signal line and the common connection point of the first conductor array has a substantially 90 degree phase difference from a signal path between the common signal line and the connection point of the second conductor array; and an isolation circuit coupled between the first and second conductor arrays to act as a blocking parallel resonance at the radio frequency.