1. Articles in category: Patents

    1-24 of 2166 1 2 3 4 ... 89 90 91 »
    1. Optical coherence tomography lumen morphology and vascular resistance measurements methods for blood vessel evaluations

      Optical coherence tomography lumen morphology and vascular resistance measurements methods for blood vessel evaluations

      A method and apparatus of automatically locating in an image of a blood vessel the lumen boundary at a position in the vessel and from that measuring the diameter of the vessel. From the diameter of the vessel and estimated blood flow rate, a number of clinically significant physiological parameters are then determined and various user displays of interest generated. One use of these images and parameters is to aid the clinician in the placement of a stent. The system, in one embodiment, uses these measurements to allow the clinician to simulate the placement of a stent and to determine ...

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    2. Imaging apparatus for diagnosis, information processing apparatus, control method thereof, program and computer-readable storage medium

      Imaging apparatus for diagnosis, information processing apparatus, control method thereof, program and computer-readable storage medium

      An imaging apparatus for diagnosis and a control method of an imaging apparatus for diagnosis are disclosed, which acquire line data represented by multiple luminance values in a radial direction from a rotation center position of an imaging core, which are derived by a rotation position and movement of the imaging core. Then, based on the acquired line data, an image of a two-dimensional space in which .theta. representing a rotation angle and z representing a position in a movement direction are set to two axes is generated and displayed.

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    3. Integrated dual swept source alternating same scan band for OCT medical imaging

      Integrated dual swept source alternating same scan band for OCT medical imaging

      An optical coherence analysis system comprising: a first swept source that generates a first optical signal that is tuned over a first spectral scan band, a second swept source that generates a second optical signal that is tuned over a second spectral scan band, a combiner for combining the first optical signal and the second optical signal to form a combined optical signal, an interferometer for dividing the combined optical signal between a reference arm leading to a reference reflector and a sample arm leading to a sample, and a detector system for detecting an interference signal generated from the ...

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    4. Optical coherence tomography technique

      Optical coherence tomography technique

      An optical coherence tomography device comprises a light generator, a dispersive medium, an optical coupler and a detector. The light generator is adapted to generate a series of input pulses of coherent light, each input pulse having an input pulse width. The dispersive medium has an input that is optically coupled to the light generator and an output for output pulses. The dispersive medium is adapted to stretch the input pulse width to an output pulse width of each of the output pulses by chromatic dispersion. The optical coupler is adapted to couple the output pulses into a reference arm ...

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      Mentions: Henning Wisweh
    5. Device for emitting super-continuous wide-band light and uses thereof

      Device for emitting super-continuous wide-band light and uses thereof

      The disclosed broadband supercontinuum light emitting device includes a nonlinear optical fiber, a pump system, a cavity, and an active medium. The active medium may comprise an active fiber and may be located inside the cavity. The active medium is configured and arranged, by means of a pumping provided by the pump system, to generate and emit chaotic pulses of laser light towards the nonlinear optical fiber, which excite the nonlinear effects thereof for the generation and emission of supercontinuum light in the form of pulses of light distributed randomly over time. Numerous uses of the device are disclosed for ...

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    6. Optical coherence tomography apparatus, control method for optical coherence tomography apparatus, and non-transitory tangible medium

      Optical coherence tomography apparatus, control method for optical coherence tomography apparatus, and non-transitory tangible medium

      Provided is an optical coherence tomography apparatus expected to facilitate observation of reliable analyzed image data to improve inspection efficiency. The tomography apparatus includes: an acquisition unit configured to acquire a tomographic image of an object to be inspected; an identifying unit configured to identify an image display area corresponding to a part to be inspected of the object to be inspected in the tomographic image; a determination unit configured to determine a significant area and a non-significant area based on a positional relationship between a periphery of the image display area and the tomographic image; and a display control ...

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    7. Optical tomographic image photographing apparatus and optical tomographic image photographing program

      Optical tomographic image photographing apparatus and optical tomographic image photographing program

      An optical tomographic image photographing apparatus for acquiring information on a tissue inside a specimen, the apparatus includes: a synthesis unit configured to generate a interference beam by synthesizing a measuring beam reflected from the tissue and a reference beam; and a detector configured to detect the generated first interference beam as a first interference signal, the first interference beam being detected for each scanning position of the measuring beam. The optical tomographic image photographing apparatus acquires tomographic information for each scanning position of the specimen by using the detected first interference signal and acquiring tomographic image data of the ...

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      Mentions: Nidek
    8. Procedural optical coherence tomography (OCT) for surgery and related methods

      Procedural optical coherence tomography (OCT) for surgery and related methods

      Methods for performing a surgical procedure using optical coherence tomography (OCT) are provided. The method includes extracting lenticular material from within a capsular bag of an eye of a patient; acquiring at least one OCT image of an interior region of the capsular bag after extraction of substantially all of the lenticular material from within the capsular bag; determining from the at least one OCT image the presence of cellular debris remaining within the interior of the capsular bag; and extracting at least a portion of the remaining cellular debris from the interior of the capsular bag.

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    9. Optical coherence tomographic imaging apparatus and method of controlling the same

      Optical coherence tomographic imaging apparatus and method of controlling the same

      An optical coherence tomographic imaging apparatus includes a movement amount acquisition unit configured to acquire an amount of rotation of a subject's eye based on a plurality of images of the subject's eye acquired at different times, and a control unit configured to control a scanning unit to correct, based on the acquired amount of rotation, a scanning position between a scan and a next scan performed by the scanning unit.

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    10. Systems, devices, methods, apparatus and computer-accessible media for providing optical imaging of structures and compositions

      Systems, devices, methods, apparatus and computer-accessible media for providing optical imaging of structures and compositions

      Exemplary systems, devices, methods, apparatus and computer-accessible media for providing and/or utilizing optical frequency domain imaging (OFDI) and fluorescence of structures and, e.g., multimodality imaging using OFDI techniques and fluorescence imaging techniques are described. For example, an arrangement can provide at least one electro-magnetic radiation to an anatomical structure. Such exemplary arrangement can include at least one optical core and at least one cladding at least partially surrounding the fiber(s). A region between the optical core(s) and the cladding(s) can have an index that is different from indexes of the optical core(s) and the ...

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    11. Microscope-less wide field-of-view surgical OCT visualization system

      Microscope-less wide field-of-view surgical OCT visualization system

      A surgical imaging system can comprise a light source, configured to generate an imaging light beam; a beam guidance system, configured to guide the imaging light beam from the light source; a beam scanner, configured to receive the imaging light from the beam guidance system, and to generate a scanned imaging light beam; a beam coupler, configured to redirect the scanned imaging light beam; and a wide field of view (WFOV) lens, configured to guide the redirected scanned imaging light beam into a target region of a procedure eye.

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      Mentions: Lingfeng Yu
    12. Optical coherence tomography with graded index fiber for biological imaging

      Optical coherence tomography with graded index fiber for biological imaging

      A system for optical coherence tomography includes a source of optical radiation, an optical fiber, and a graded index fiber attached to a distal end of the optical fiber. The optical fiber and the graded index fiber are together configured to provide a common path for optical radiation reflected from a reference interface at a distal end of the graded index fiber and from a target.

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      Mentions: Avinger
    13. Optical coherence tomography apparatus and optical coherence tomography method

      Optical coherence tomography apparatus and optical coherence tomography method

      An OCT apparatus includes a wavelength selector provided on an optical path between a light source unit and a pair of optical detection units, and having a wavelength selectivity with equal wavenumber intervals. A differential detection unit detects a differential between two interference lights detected by the two optical detection units, and an information acquisition unit obtains peak values in the temporal waveform of the intensity of the interference lights and acquires information about an object on the basis of the obtained peak value

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    14. Optical surface identification for laser surgery

      Optical surface identification for laser surgery

      Systems and methods automatically locate optical surfaces of an eye and automatically generate surface models of the optical surfaces. A method includes OCT scanning of an eye. Returning portions of a sample beam are processed to locate a point on the optical surface and first locations on the optical surface within a first radial distance of the point. A first surface model of the optical surface is generated based on the location of the point and the first locations. Returning portions of the sample beam are processed so as to detect second locations on the optical surface beyond the first ...

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      Mentions: OptiMedica
    15. Optical coherence tomography system with multiple sample paths

      Optical coherence tomography system with multiple sample paths

      Improved optical coherence tomography (OCT) imaging systems are generally described. In an example, an OCT imaging system includes a tunable laser source, an interferometer, a splitter, and a detector. The tunable laser source is configured to provide a wavelength-scanned beam. The interferometer is configured to split the wavelength-scanned beam into a reference beam and an object beam. The splitter is configured to split the object beam into a first path corresponding to an anterior chamber imaging component and a second path corresponding to a retinal imaging component. The detector is configured to detect a signal caused by interference between the ...

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    16. Method and system for optical coherence tomography including obtaining at least two two-dimensional images of an object in three-dimensional space

      Method and system for optical coherence tomography including obtaining at least two two-dimensional images of an object in three-dimensional space

      A method and corresponding system for optical coherence tomography includes optical coherence tomography equipment that acquires at least two two-dimensional initial images of an object in planes of the object that are spaced apart from one another, in particular running parallel to one another, wherein the initial images each include a plurality of initial image values. In order to assure an examination of the object in the case of medical applications that is as reliable as possible, an interpolation of the initial image values of the at least two two-dimensional initial images is performed in three-dimensional space, wherein interpolation values ...

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      Mentions: AGFA Healthcare
    17. Automated assessment of glaucoma loss from optical coherence tomography

      Automated assessment of glaucoma loss from optical coherence tomography

      Systems and methods for assessing glaucoma loss using optical coherence topography. One method according to an aspect comprises receiving optical coherence image data and assessing functional glaucoma damage from retinal optical coherence image data. In an aspect, the systems and methods can map regions and layers of the eye to determine structural characteristics to compare to functional characteristics.

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    18. High visibility endoprosthesis and method

      High visibility endoprosthesis and method

      An endoprosthesis, a method for imaging an endoprosthesis, a method of making an endoprosthesis involve a polymeric substrate that has been modified to have voids embedded within the substrate. The voids are sized to scatter optical radiation from within the substrate so that an optical coherence tomography (OCT) image can be obtained in which an interior region of the substrate can be easily differentiated from empty space and other structures that surround the endoprosthesis. The voids allow for OCT visualization of the polymeric substrate which may be difficult to visualize by other methods such as fluoroscopy.

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    19. Integrated OCT-refractometer system for ocular biometry

      Integrated OCT-refractometer system for ocular biometry

      A Slit-lamp-or-Microscope-Integrated-OCT-Refractometer system includes an eye-visualization system, configured to provide a visual image of an imaged region in an eye; an Optical Coherence Tomographic (OCT) imaging system, configured to generate an OCT image of the imaged region; a refractometer, configured to generate a refractive mapping of the imaged region; and an analyzer, configured to determine refractive characteristics of the eye based on the OCT image and the refractive mapping, wherein the refractometer and the OCT imaging system are integrated into the eye visualization system

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    20. Cardiovascular OCT image making method and method for detecting stents using thereof

      Cardiovascular OCT image making method and method for detecting stents using thereof

      A cardiovascular OCT image making method which reduces artifacts includes the steps of: inputting a cardiovascular OCT image; converting coordinates of the inputted OCT image into two-dimensional polar coordinates (.theta. and r); generating a brightness control function of the A-line direction based on the blood wall relative to each .theta. value; forming a brightness image in the A-line direction based on the blood wall depending on the brightness control function; and forming an OCT image of which brightness is controlled by the brightness image by applying the brightness image formed on the inputted OCT image.

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    21. OCT probe with pivoting fiber

      OCT probe with pivoting fiber

      An OCT probe for imaging patient tissue may include an actuation system arranged to displace an optical fiber within a cannula. The actuation system may include a driver actuatable to displace a portion of the optical fiber, with the driver acting in an angled direction relative to the axis of the cannula. The actuation system also may include a pivot feature operably engaged with the optical fiber in a manner permitting the optical fiber to pivot on the pivot feature when the driver actuates to displace the portion of the optical fiber.

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    22. Non-invasive method and apparatus for screening high-quality seeds

      Non-invasive method and apparatus for screening high-quality seeds

      Disclosed is a method and apparatus for the non-invasive selection of high-quality seeds, based on optical coherence tomography, by which pathogen-infected and pathogen-free seeds can be discriminated in a non-invasive manner. The apparatus is operated by the processes of scanning a seed of diagnostic interest in a non-invasive manner using an optical coherence tomographic unit; processing interference signals of the scanned tomographic images to produce tomographic image data of the seed of diagnostic interest; analyzing the tomographic image data; comparing the analyzed tomographic image data with preset reference tomographic image data; diagnosing the seed of diagnostic interest as a pathogen-infected ...

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    23. Establishing compatibility between two- and three-dimensional optical coherence tomography scans

      Establishing compatibility between two- and three-dimensional optical coherence tomography scans

      Advances in optical coherence tomography (OCT) have prompted a transition from time domain OCT, providing 2D OCT images, to spectral domain OCT, which has a 3D imaging capability. Yet conventional technology offers little toward the goal of inter-device compatibility between extant 2D OCT images and newer 3D OCT images for the same or comparable subjects, as in the context of ongoing monitoring the quantitative status of a patient's eyes. The inventive methodology is particularly useful to identify the scan location of tissue in a 2D OCT image within the 3D OCT volumetric data, thereby allowing clinicians to image a ...

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    1-24 of 2166 1 2 3 4 ... 89 90 91 »
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  3. Organizations in the News

    1. (1 articles) Harvard University
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  4. People in the News

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