US 11,950,854 B2
Acousto-optical active markers for interventional MRI
Fahrettin Levent Degertekin, Atlanta, GA (US); Ozgur Kocaturk, Rockville, IL (US); and Yusuf S. Yaras, Atlanta, GA (US)
Assigned to Georgia Tech Research Corporation, Atlanta, GA (US)
Appl. No. 17/258,806
Filed by Georgia Tech Research Corporation, Atlanta, GA (US)
PCT Filed Jul. 9, 2019, PCT No. PCT/US2019/041011
§ 371(c)(1), (2) Date Jan. 8, 2021,
PCT Pub. No. WO2020/014230, PCT Pub. Date Jan. 16, 2020.
Claims priority of provisional application 62/695,235, filed on Jul. 9, 2018.
Prior Publication US 2021/0267696 A1, Sep. 2, 2021
Int. Cl. A61B 34/20 (2016.01); A61B 5/00 (2006.01); A61B 5/05 (2021.01); A61B 5/055 (2006.01); A61B 5/06 (2006.01); A61B 90/00 (2016.01); A61M 25/01 (2006.01); G01R 33/28 (2006.01); G01R 33/36 (2006.01)
CPC A61B 34/20 (2016.02) [A61B 5/0097 (2013.01); A61B 5/05 (2013.01); A61B 5/055 (2013.01); A61B 5/065 (2013.01); A61B 90/39 (2016.02); A61M 25/0105 (2013.01); G01R 33/287 (2013.01); G01R 33/3692 (2013.01); A61B 2034/2051 (2016.02); A61B 2034/2061 (2016.02); A61B 2034/2063 (2016.02); A61B 2090/3958 (2016.02); A61B 2090/3987 (2016.02); A61M 25/0108 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A catheter retrofit system for active magnetic resonance imaging (MRI) device location visualization comprising:
a mounting tube configured to accept a catheter and to a least partially conform to a shape of the catheter;
a non-conductive optical fiber with a distal end in communication with a portion of the mounting tube, a proximal end, and an acousto-optical sensor region disposed in proximity to the distal end and comprising a first fiber Bragg grating (FBG);
an electro-mechanical conversion assembly comprising:
a first antenna disposed on the mounting tube and configured to receive radio-frequency (RF) electromagnetic energy and produce a corresponding electrical signal; and
a first piezoelectric transducer in mechanical communication with the first FBG, and in electrical communication with the first antenna;
wherein the first piezoelectric transducer is configured to modulate elastic properties of the acousto-optical sensor region with acoustic waves generated responsive to the electrical signal received from the first antenna; and
an acoustic resonator in communication with the optical fiber and configured to at least partially reflect the generated acoustic waves for enhanced modulation of the acousto-optical sensor region;
wherein characteristics of the modulated elastic properties of the optical fiber are detectable at the proximal end of the optical fiber; and
wherein at least the optical fiber and the electro-mechanical conversion assembly are configured to reduce MRI RF-induced heating of the system.