  We propose a system to visualize the chirality of the protein in brains,
which would be helpful to diagnose early neurological degenerative diseases in
vivo. These neurological degenerative diseases often occur along with some mark
proteins. By nanoparticle instilling and metamaterial technique, the chiral
effect of the mark proteins is assumed to be manifest in microwave regime.
Therefore, by detecting the transmission of cross-polarization, we could detect
the chirality that rotates the microwave polarization angle. We developed a
numerical method to simulate the electromagnetic response upon chiral
(bi-isotropic) material. Then a numerical experiment was conduct with a
numerical head phantom. A map of cross-polarized transmission magnitude can be
reached by sweeping the antenna pair. The imaging results matches well with the
distribution of chiral materials. It suggests that the proposed method would be
capable of in vivo imaging of neurological degenerative disease using
microwaves.
