Patent ID: 11890097
Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 12:
13. A method of diagnosing an issue in a subject's brain, the method comprising:
reading a measured value from a first frequency counter on a first resistive, inductive, and capacitive (RLC) circuit connected with a first sensor coil;
reading a measured value from a second frequency counter on a second RLC circuit connected with a second sensor coil, the second sensor coil being coaxial around a common axis with the first sensor coil and having a larger or smaller diameter than the first sensor coil, the first and second sensor coils forming a sensor unit, the sensor unit held to a subject's head;
determining a cranial location at which the measured values are read;
retrieving, from a memory, control values associated with the cranial location;
comparing the measured values with the control values to generate deltas;
comparing each delta to a positive threshold and a negative threshold in order to ascertain an exceedance, the exceedance having a sign and a magnitude; and
indicating, to a user, a type of issue based on the sign of the exceedance.