A Millimeter Scale Implanted Coil with an Integrated Wireless Amplifier for Imaging of the Rodent Kidney

Chunqi Qian¹, Stephen Dodd¹, Der-Yow Chen¹, Joe Murphy-Boesch¹, Alan Koretsky¹

An implantable resonator with an integrated parametric amplifier has been constructed to provide enhanced localized sensitivity of internal organs in the rodent. The sample coil was one element of a non-linear double frequency resonator that mixed the MR signal with a pump frequency to produce an amplified output at the Larmor frequency. The resonator/wireless amplifier was 3mm x 3mm x 7mm in size, and it enabled high resolution images to be obtained to identify small vascular structures of a rat kidney in vivo.