1. Articles from uspto.gov

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  2. 1-24 of 2053 1 2 3 4 ... 84 85 86 »
    1. Apparatus and method for generating 3-D data for an anatomical target using optical fiber shape sensing

      Apparatus and method for generating 3-D data for an anatomical target using optical fiber shape sensing

      A fiber housing includes multiple shape sensing cores and a single optical core. A distal end of the fiber housing is positionable to direct the single optical core to a current point of an anatomical target. Collimated light over a first range of frequencies is projected from the single optical core to the current point. OFDR is used to detect reflected light scattered from the current point and to process the detected light to determine a distance to the current point. Light over a second range of frequencies is projected through the multiple shape sensing optical cores to the distal ...

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    2. Polarization sensitive optical coherence tomography using multiple polarization sensitive semiconductor optical amplifiers

      Polarization sensitive optical coherence tomography using multiple polarization sensitive semiconductor optical amplifiers

      This disclosure relates to an OCT apparatus configured to generate to electromagnetic (e.g., optical) signals having two different polarization states. Two or more silicon optical amplifiers (SOAs) can be configured to maintain a respective polarization state in an optical input signal provided from a light source (e.g., a broadband light source). The different polarization states can be combined by an optical combiner (e.g., a polarization maintaining fiber coupler) and provided to drive a reference arm and a sample arm implemented in an OCT system.

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    3. Speckle reduction in optical coherence tomography images

      Speckle reduction in optical coherence tomography images

      An optical coherence tomography (OCT) image composed of a plurality of A-scans of a structure is analyzed by defining, for each A-scan, a set of neighboring A-scans surrounding the A-slices scan. Following an optional de-noising step, the neighboring A-scans are aligned in the imaging direction, then a matrix X is formed from the aligned A-scans, and matrix completion is performed to obtain a reduced speckle noise image.

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    4. Jones matrix OCT system and program for carrying out image processing on measured data obtained by said OCT

      Jones matrix OCT system and program for carrying out image processing on measured data obtained by said OCT

      A Jones matrix OCT offers improved image stability, image quality, and depth range of image, wherein light from a wavelength-scanning light source is split into two optical paths, and a reference arm is provided along one optical path, while a probe arm that irradiates and reflects light onto the measuring target to generate object light is provided along the other optical path. The probe arm has a polarization delay unit that linearly polarizes the light and then splits it into S-wave component and P-wave component, where the S-wave component and P-wave component are superimposed through optical paths of different optical ...

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    5. Microscope having an optical coherence tomography device

      Microscope having an optical coherence tomography device

      A microscope having an observation beam path including a main objective, an OCT device including a first detection beam path, a wavefront measuring device including a second detection beam path, a first, a second and a third optics group is provided, wherein the first detection beam path contains the main objective and the first to third optics group, and the first to third optics group forms an afocal imaging optical unit of the first detection beam path and the second detection beam path contains the main objective, the first optics group and the second optics group, and the main objective ...

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    6. Automatic three-dimensional segmentation method for OCT and doppler OCT angiography

      Automatic three-dimensional segmentation method for OCT and doppler OCT angiography

      A three-dimensional (three dimensional) segmentation method with intensity-based Doppler variance (IBDV) based on swept-source OCT. The automatic three dimensional segmentation method is used to obtain seven surfaces of intra-retinal layers. The microvascular network of the retina, which is acquired by the IBDV method, can be divided into six layers. The microvascular network of the six individual layers are visualized, and the morphology and contrast images can be improved by using the segmentation method. This method has potential for earlier diagnosis and precise monitoring in retinal vascular diseases. Each tomographic image is composed of eight repeat scans at the same position ...

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    7. Method to characterize cut gemstones using optical coherence tomography

      Method to characterize cut gemstones using optical coherence tomography

      The invention includes an improvement in a method of assessing a gemstone having at least one planar face with an internally reflecting surface including the steps of optically modifying the at least one planar face of the gemstone to return a sample beam from an internally reflecting plane corresponding to the at least one planar face to an optical coherence tomography (OCT) system; selectively directing the sample beam from an optical coherence tomography (OCT) system onto the gemstone; and generating an OCT image map of the gemstone to determine volume, gem carat weight and/or quality.

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    8. Ophthalmic imaging apparatus and ophthalmic image processing apparatus

      Ophthalmic imaging apparatus and ophthalmic image processing apparatus

      An ophthalmic imaging apparatus of an embodiment includes a data acquisition unit, a blood vessel enhanced image forming unit, and a blood vessel gradient distribution determination unit. The data acquisition unit is configured to acquire a three dimensional data set of a fundus of a subject's eye using optical coherence tomography (OCT). The blood vessel enhanced image forming unit is configured to form a blood vessel enhanced image based on the three dimensional data set. The blood vessel gradient distribution determination unit is configured to determine a blood vessel gradient distribution that shows gradients of blood vessels at a ...

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    9. Apparatus and method for measuring blood flow of vessels

      Apparatus and method for measuring blood flow of vessels

      An apparatus and a method for measuring blood flow of vessels are provided. The apparatus includes a light source, a light splitting module, a reference arm module, a sample arm module, a probing module, and a control system. The sample arm module includes a scanning unit and an optical-path shifting device. A probe light is obtained from the light splitting module, and a central line of a main light of the probe light extends through a rotation axis of the scanning unit. The probe light is reflected by the scanning unit to the optical-path shifting device. When the optical-path shifting ...

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    10. Machining head for a laser machining device

      Machining head for a laser machining device

      The invention relates to a machining head for a laser machining device, which is equipped for machining a workpiece (24) using laser radiation (30). The laser machining head comprises an adjustable focusing optical unit (34), which focuses the laser radiation (30) in a focal spot (22). The distance between the focal spot (22) and a machining head can be modified by modifying the focal length of the focusing optical unit (34). A scanning apparatus (44) deflects the laser radiation (30) in different directions. An optical coherence tomography device (48) measures a distance between the treatment head and the workpiece (24 ...

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    11. Automated intravascular plaque classification

      Automated intravascular plaque classification

      Methods and apparatus automatically classify intravascular plaque using features extracted from intravascular optical coherence tomography (IVOCT) imagery. One example apparatus includes an image acquisition circuit that accesses a set of IVOCT images, a pre-processing circuit that generates a blood vessel mask based on the IVOCT images, a feature extraction circuit that defines a three dimensional (3D) volume of interest centered on a location in a member of the set of IVOCT images, a classification circuit that generates a classification based on a probability that a voxel represents a type of plaque, and a visualization circuit that provides a visualization, substantially ...

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    12. Detection of and validation of shadows in intravascular images

      Detection of and validation of shadows in intravascular images

      In part, the disclosure relates to shadow detection and shadow validation relative to data sets obtained from an intravascular imaging data collection session. The methods can use locally adaptive thresholds and scan line level analysis relative to candidate shadow regions to determine a set of candidate shadows for validation or rejection. In one embodiment, the shadows are stent strut shadows, guidewire shadows, side branch shadows or other shadows.

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      Mentions: St. Jude Medical
    13. Methods and systems for performing optical coherence tomography

      Methods and systems for performing optical coherence tomography

      Configurations are disclosed for a health system to be used in various healthcare applications, e.g., for patient diagnostics, monitoring, and/or therapy. The health system may comprise a light generation module to transmit light or an image to a user, one or more sensors to detect a physiological parameter of the user's body, including their eyes, and processing circuitry to analyze an input received in response to the presented images to determine one or more health conditions or defects.

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    14. Correction of decorrelation tail artifacts in a whole OCT-A volume

      Correction of decorrelation tail artifacts in a whole OCT-A volume

      A method and system for correction of decorrelation tail artifacts in optical coherence tomography (OCT) angiography volumetric data defines a movable target subvolume within the OCT-A volumetric data. The target subvolume is axially moveable within the OCT-A volumetric data in discrete axial steps. At each axial step, a reference subvolume corresponding to a depth location in the OCT A volumetric data is defined axially offset from the target subvolume. The reference subvolume may be defined within the OCT A volumetric data, or defined within a different (previously corrected) OCT-A volume. Irrespective, corrected OCT-A data that corrects for decorrelation tail artifacts ...

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    15. System and method for classifying and quantifying age-related macular degeneration

      System and method for classifying and quantifying age-related macular degeneration

      The present disclosure describes a system and method to classify optical coherence tomography (OCT) images. The present system can classify OCT images without first segmenting the retina tissue. The system can generate one or more profiles from vertical transects through the OCT images. The system can identify image statistics based on the one or more profiles. The system's classifier can then classify the OCT images based on the identified image statistics.

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    16. Optical coherence tomographic image generation apparatus

      Optical coherence tomographic image generation apparatus

      An optical coherence tomographic image generation apparatus includes: a probe including a two-dimensional scanning mechanism therein reflecting a beam incident from one of sides of the probe while a position of the beam is shifted by time-division drive; an optical unit that detects an optical coherent light created by interference between the reference beam and scattered light returned by reflection from the measuring object irradiated through the probe with the measurement beam to generate an optical coherent tomographic image from the detection signal of the coherent light acquired in a time base in one of first or second operation modes ...

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    17. Optical tomography digital impression imaging system and method for use thereof

      Optical tomography digital impression imaging system and method for use thereof

      Provided are an optical tomography digital-impression imaging system and a method for use thereof, said system including: an optical coherence tomography scanner, used for obtaining tomographic slice thicknesses of a plurality of tissue areas of each optical tomography digital image; an information analysis and processing component electrically connected to the optical coherence tomography scanner. The information analysis and processing component has a refractive index compensation and optical path correction functions; by way of analysis and processing, tomographic slice thickness correction values corresponding to the tissue areas are obtained, thus establishing a digital model of the tissue areas

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    18. Optical coherence tomography system combining two wavelengths

      Optical coherence tomography system combining two wavelengths

      An optical coherence tomography (OCT) system combining multiple wavelengths is generally described. In an example, the OCT system includes a first light source configured to emit a first beam having a first wavelength. The OCT system further includes a second light source configured to emit a second beam having a second wavelength. The OCT system further includes an interferometer. The first beam and the second beam are configured to be directed into the interferometer. The interferometer includes a reference path and an interferometer sample path. The OCT system further includes a first beam splitter configured to divide, from an output ...

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    19. High-sensitive swept-source optical coherence tomography system and methods of use thereof

      High-sensitive swept-source optical coherence tomography system and methods of use thereof

      An exemplary system can be provided which can include, for example, a plurality of source arrangements configured to provide a plurality of electro-magnetic radiations to at least one of at least one sample or at least one reference structure, a first arrangement configured to receive a first radiation(s) from the reference structure(s), a second arrangement configured to receive a second radiation(s) from the sample(s), where a portion(s) of the second radiation(s) can be in an invisible spectrum, a third arrangement configured to combine the first radiation(s) and the second radiation(s) into a ...

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    20. Flow imaging in an optical coherence tomography (OCT) system

      Flow imaging in an optical coherence tomography (OCT) system

      A method for imaging includes scanning a B scan of a sample N times at a first slice of a sample. N is greater than or equal to 2. The B scan includes a plurality of A scans. A pixel of the first slice has an M number of A scans within the pixel. Each of the A scans have a spectrum range less than a full spectrum range of the light source. A number of pixels per B scan is an approximate B scan length divided by a lateral resolution size of the pixel. The method further includes determine ...

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    21. Automated quantification of nonperfusion in the retina using optical coherence tomography angiography

      Automated quantification of nonperfusion in the retina using optical coherence tomography angiography

      Disclosed are methods and systems for measuring areas of nonperfusion in the retina using OCT imaging. The disclosed methods and systems allow for the automated segmentation and quantification of avascular areas of the retina utilizing information obtained from both structural OCT and OCT angiography (OCTA) data. The disclosed methods include filtering approaches which enhance vessel structure while suppressing noise, dynamic thresholding approaches to mitigate the detrimental effects of within-scan variability and low scan quality, and distance transform-based approaches to improve detection of ischemic regions. When combined with methods such as projection-resolved OCTA, the sensitivity to detect nonperfusion within different plexuses ...

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    22. Wavelength tunable laser device

      Wavelength tunable laser device

      A photonic integrated circuit wavelength tunable laser device includes a gain element integrated into a photonic integrated circuit. The gain element provides optical gain to an optical signal. A tunable filter is integrated into the photonic integrated circuit. A modulator is integrated into the photonic integrated circuit that modulates the optical signal as a function of time, wherein the gain element, the tunable filter, and the modulator form a wavelength tunable laser device having a wavelength that tunes as a function of time.

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      Mentions: Eric A. Swanson
    23. Integrated optical system with photonic integrated circuit including coherent optical receiver and optical phased array

      Integrated optical system with photonic integrated circuit including coherent optical receiver and optical phased array

      An integrated optical system includes a frequency tunable optical source. A reference path is coupled to the frequency tunable source. The integrated optical system also includes a photonic integrated circuit (PIC) comprising a coherent optical receiver that is optically coupled to the reference path. An optical phased array is optically coupled to the frequency tunable source and is positioned to couple light to and from a sample. The integrated optical system is configured such that when the frequency tunable optical source is tuned in optical frequency, the coherent optical receiver produces electrical signals having optical information about the sample.

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      Mentions: Eric A. Swanson
    1-24 of 2053 1 2 3 4 ... 84 85 86 »
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