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

Claim 12:
13. A system for diagnosing internal characteristics of a conducting structure, the system comprising:
an NMR/MRI magnet;
at least one radiofrequency coil removably positioned within the NMR/MRI magnet;
a holder configured to receive a conducting structure; and
a detection medium,
wherein internal characteristics of the conducting structure are obtained by 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, determining frequency changes between the first distribution of frequencies of the detection medium and the second distribution of frequencies of the detection medium by exciting nuclear or electronic spins within the detection medium using a first electromagnetic signal having a first frequency, receiving a second electromagnetic signal having a second frequency from the detection medium,
wherein the detection medium is external to the conducting structure,
wherein the first distribution of frequencies different from the second distribution of frequencies; and
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.