Patent ID: 11921067
Assignee: NEW YORK UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method of diagnosing a conducting structure, the method comprising:
providing the conducting structure in a magnetic field;
exciting nuclear or electronic spins within a detection medium using an electromagnetic signal having a first frequency;
receiving an electromagnetic signal having a second frequency from the detection medium;
obtaining a first distribution of frequencies of the detection medium at a first time and a second distribution of frequencies of the detection medium at a second time different from the first time, the detection medium external to the conducting structure and the first distribution of frequencies different from the second distribution of frequencies; and
detecting frequency changes between the first distribution of frequencies of the detection medium and the second distribution of frequencies of the detection medium to obtain internal characteristics of the conducting structures;
wherein the internal characteristics of the conducting structure are modeled on the basis of magnetic susceptibility differences and changes within the conducting structure, the modeling comprising:
assigning one or more regions within the conducting structure a given magnetic susceptibility; and
calculating a generated magnetic field based on an effect on the detection medium,
wherein susceptibilities of the one or more regions form parameters configured to be fit by minimizing differences between a calculated frequency distribution and a measured frequency distribution in the detection medium.