Inductive damping brain sensor

An inductive sensor apparatus for brain diagnostics comprising:

• a first sensor coil connected with a first resistive, inductive, and capacitive (RLC) circuit and first frequency counter;
• a second sensor coil connected with a second RLC circuit and second frequency counter, the second sensor coil having a larger or smaller diameter than the first sensor coil, the first and second sensor coils forming a sensor unit;
• a memory storing control values derived from prior sensor coil measurements of one or more normal brains in vivo, each control value associated with a corresponding cranial location;
• a computer processor operatively connected with a machine-readable non-transitory medium embodying information indicative of instructions for causing the computer processor to perform operations comprising:
• generating measure values based on outputs from the first and second frequency counters when the sensor unit is at a cranial location;
• determining the cranial location at which the measured values are associated;
• retrieving, from the memory, control values associated with the cranial location;
• comparing the measured values to the control values to generate deltas;
• comparing the deltas to a positive threshold and a negative threshold associated with each cranial location to ascertain an exceedance, the exceedance having a sign and a magnitude;
• and
• outputting an indication based on the sign of the exceedance, and an indicator or display connected with the computer processor for the indications.