Patent ID: 8791696

Claim:
A preamplifier arrangement for a magnetic resonance imaging (MRI) system, the preamplifier arrangement comprising: a plurality of preamplifiers, each of the preamplifiers connected to a different coil of a multi-channel coil array of the MRI system, wherein the preamplifiers are configured as on-coil preamplifiers coupled to the multi-channel coil array, and wherein each preamplifier and corresponding coil couple to form a set of oscillators, the oscillators having resonant frequencies at matched split peaks; and a plurality of feedback networks, each feedback network comprising a parallel resonator, the parallel resonator being connected between an input and an output of a corresponding preamplifier, each of the feedback networks configured to generate negative feedback at the matched split peaks to suppress gain at frequencies of the matched split peaks, the negative feedback outside a clinically relevant frequency range of the MRI system.