# US 2021/0239451 A1 · Forward looking rgb/optical coherence tomography duplex imager > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0239451 A1 - Document ID: US20210239451A1 - Status: Published application - Kind: A1 - Application number: 17/236,901 - Filed: 2021-04-21 - Published: 2021-08-05 - Earliest claimed: 2020-01-30 - Assignees: Veravanti Inc. - Applicants: VerAvanti Inc. - Inventors: Gerald McMorrow; Jongtae Yuk - Web page: https://patentgrep.com/patent/US20210239451A1 ## CPC - G01B 9/02091: Tomographic interferometers, e.g. based on optical coherence - A61B 1/0005: {combining images e.g. side-by-side, superimposed or tiled} - A61B 1/0017: {Details of single optical fibres, e.g. material or cladding} - A61B 1/00172: {with means for scanning} - A61B 3/102: {for optical coherence tomography [OCT]} - A61B 5/0066: {Optical coherence imaging} - A61B 5/0084: {for introduction into the body, e.g. by catheters (A61B5/1459 takes precedence)} - G01B 9/0203: {With imaging systems} - G01B 9/02087: {Combining two or more images of the same region} - A61B 2090/3735: {Optical coherence tomography [OCT]} - G01B 2290/65: Spatial scanning object beam - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Systems, methods, and devices for directed to duplex imaging techniques for combining high-resolution surface images obtained with a Scanning Fiber Endoscope (SFE), and high-resolution penetrating OCT images obtained through Optical Coherence Tomography (OCT), from a SFE, and interleaving frames to improve resolution and identify below surface information of biological structures. ## Claims ### Claim 1 A method for acquiring OCT B-mode images, comprising: oscillating a cantilever scanning fiber within a probe along a scanning path, wherein the probe is configured to obtain reflected light generated by the scanning fiber, and the oscillating scanning path increases in amplitude over time; obtaining a plurality of A-line scans from the obtained reflected light, each A-line scan obtained at a point along the oscillating scanning path that the scanning fiber reaches a minimum speed; and constructing a B-mode image from the plurality of A-line scans. ### Claim 2 (depends on 1) The method of claim 1, wherein the oscillating scanning path is defined by two sinusoidal inputs. ### Claim 3 (depends on 1) The method of claim 1, further comprising constructing a plurality of B-mode images from the plurality of A-line scans, each B-mode image offset by a scanning angle. ### Claim 4 (depends on 3) The method of claim 3, further comprising interleaving the plurality of B-mode images to construct a three-dimensional image. ### Claim 5 (depends on 1) The method of claim 1, further comprising: constructing a plurality of RGB images from the reflected light obtained while the scanning fiber moves along the oscillating scanning path. ### Claim 6 (depends on 5) The method of claim 5, further comprising interleaving the plurality of RGB images to create a first image of a duplex image; and interleaving the plurality B-mode images to create a second image of the duplex image. ### Claim 7 (depends on 1) The method of claim 1, wherein the probe is in a scanning fiber endoscope. ### Claim 8 (depends on 1) The method of claim 1, further comprising: analyzing the reflected light generated by the scanning fiber with an interferometer to identify an origin and a location of the reflected light. ### Claim 9 (depends on 8) The method of claim 8, further comprising: utilizing a reference arm to provide a reference point for the interferometer. ### Claim 10 A non-transitory computer readable storage medium comprising instructions stored thereon that cause a computing system to at least: oscillate a cantilever scanning fiber within a probe along a scanning path, wherein the probe is configured to obtain reflected light generated by the scanning fiber, the oscillating scanning path increasing in amplitude over time; obtain a plurality of A-line scans from the obtained reflected light, each A-line scan obtained at a point along the oscillating scanning path where a speed of the scanning fiber is at a minimum; and construct a B-mode image from the plurality of A-line scans. ### Claim 11 (depends on 10) The non-transitory computer readable storage medium of claim 10, further comprising instructions to cause the computing system to at least construct a plurality of B-mode images from the plurality of A-line scans, each B-mode image offset by a scanning angle. ### Claim 12 (depends on 11) The non-transitory computer readable storage medium of claim 11, further comprising instructions to cause the computing system to at least interleave the plurality of B-mode images to construct a three-dimensional image. ### Claim 13 (depends on 11) The non-transitory computer readable storage medium of claim 11, further comprising instructions to cause the computing system to at least: construct a plurality of RGB images from the reflected light obtained while the scanning fiber moves along the oscillating scanning path; and interleave the plurality B-mode images as a first image of a duplex image and interleave the plurality of RGB images as a second image of the duplex image. ### Claim 14 (depends on 10) The non-transitory computer readable storage medium of claim 10, wherein the B-mode image depicts an area within a blood vessel lumen. ### Claim 15 (depends on 10) The computer readable storage medium of claim 10, wherein the B-mode image identifies an occlusion within a blood vessel. ### Claim 16 (depends on 10) The non-transitory computer readable storage medium of claim 10, further comprising instructions to cause the computing system to at least: analyze the reflected light generated by the scanning fiber with an interferometer to identify an origin and a location of the reflected light. ### Claim 17 (depends on 16) The non-transitory computer readable storage medium of claim 16, further comprising instructions to cause the computing system to at least: utilize a reference arm to provide a reference point for the interferometer.