Patent ID: 11950854
Assignee: GEORGIA TECH RESEARCH CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 13:
14. A catheter retrofit system for magnetic resonance imaging (MRI) active device location visualization, the system comprising:
a retrofitted interventional probe comprising:
a mounting tube configured to accept a catheter and to a least partially conform to a shape of the catheter;
an optical fiber including a distal end in communication with a portion of the mounting tube; and
an acousto-optical sensor region disposed at the distal end of the optical fiber, the acousto-optical sensor region including an electro-mechanical conversion assembly comprising:
one or more antennae disposed on the mounting tube and configured to receive radio-frequency (RF) electromagnetic energy and produce a corresponding electrical signal; and
a radial mode resonator in mechanical communication with the acousto-optical sensor region, wherein the radial mode resonator is in electrical communication with one or more of the antennae, wherein the radial mode resonator is configured to modulate elastic properties of the acousto-optical sensor region with acoustic waves generated responsive to the electrical signal received from the one or more antennae, and wherein at least a thickness dimension of the radial mode resonator is configured to produce one or more resonance frequencies corresponding with one or more Larmor frequencies; and

a mechanical-optical conversion assembly in communication with a proximal end of the optical fiber, the mechanical-optical conversion assembly including:
a light source coupled to the proximal end of the optical fiber and configured to interrogate the acousto-optical sensor region; and
a photodetector coupled to the proximal end of the optical fiber, the photodetector configured to receive interrogation light reflected from the acousto-optical sensor region.