Passive dual coil resonator

A passive dual coil resonator (pDCR) is a purely passive receive coil insert for a preclinical magnetic particle imaging (MPI) system which provides frequency-selective signal enhancement.

[1] One of the biggest challenges in MPI is to achieve a good signal-to-noise ratio, especially for higher harmonics.

The intention behind this is that as many harmonics of the induced particle signal as possible, which drop in intensity at higher frequencies and then disappear in the noise floor, should be usable for image reconstruction to reach a better spatial resolution.

As the name suggests, the pDCR, which consists of two coaxial coils, is passive because it does not have a voltage source and also no electrical connection to the rest of the MPI scanner system.

It then sends out the received signal with its exterior coil, but enhanced in the range of its resonant frequency.