1. Articles from uspto.gov

    patft.uspto.gov

  2. 1-24 of 1975 1 2 3 4 ... 81 82 83 »
    1. Optical probes with reflecting components for astigmatism correction

      Optical probes with reflecting components for astigmatism correction

      Some devices comprise a first light-guiding component, a second light-guiding component, a lens, an optical-correction component that has a reflecting surface that faces the lens, and a sheath, which causes astigmatism. The reflecting surface has an optical power on a first axis of two orthogonal axes, the optical power on the first axis compensates for the astigmatism, and the reflecting surface has a negligible optical power on a second axis of the two orthogonal axes. Also, the reflecting surface is configured to reflect light from the lens and redirect the reflected light through the sheath.

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    2. Distance measuring device and method for measuring distances

      Distance measuring device and method for measuring distances

      A device for measuring a distance to an object comprises a beam splitter for splitting broadband coherent light emitted by a light source in measuring light which is guided through an object arm to the object to be measured and in reference light which is guided to a reference arm. The object arm includes a focusing optics with a focus movable along an optical axis of the object arm. The focusing optics comprises a movable optical element and is configured such that a movement of the movable optical element along the optical axis causes a higher movement of the focus ...

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    3. Method and system for characterising biological tissue

      Method and system for characterising biological tissue

      The present disclosure provides a method for characterizing a region of interest within or between biological tissue. The method comprises inserting at least a portion of a probe into the region of interest and directing electromagnetic radiation to the region of interest and receiving electromagnetic radiation from the region of interest using the probe in a direction that is transversal to a length of the probe. Further, the method comprises directing a fluid to the region of interest through a portion of the probe and analyzing received electromagnetic radiation.

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    4. Integrated multimodality intravascular imaging system that combines optical coherence tomography, ultrasound imaging, and acoustic radiation force optical coherence elastography

      Integrated multimodality intravascular imaging system that combines optical coherence tomography, ultrasound imaging, and acoustic radiation force optical coherence elastography

      An integrated intraluminal imaging system includes an optical coherence tomography interferometer (OCT), an ultrasound subsystem (US) and a phase resolved acoustic radiation force optical coherence elastography subsystem (PR-RAF-OCE). The steps include performing OCT to generate a returned optical signal, performing US imaging to generate a returned ultrasound signal, performing PRARF-OCE to generate a returned PR-ARF-OCE signal by generating a amplitude modulated ultrasound beam or chirped amplitude modulated ultrasound beam to frequency sweep the acoustic radiation force, measuring the ARF induced tissue displacement using phase resolved OCT, and the frequency dependence of the PR-ARF-OCE signal, processing the returned optical signal, the ...

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    5. Distance, diameter and area determining device

      Distance, diameter and area determining device

      An elongated member such as a catheter that uses ultrasound or optical coherence tomography "OCT") technology to approximate the dimensions of a structure into which the catheter has been placed. The catheter includes multiple ultrasound transducers arranged in an annular or circumferential configuration on, embedded into or within the body of the elongated member so that distance measurements can be obtained between the elongated member and the wall of the immediately facing structure (e.g., a fluid-filled lumen). Utilizing these measurements, the present invention approximates for the physician the shape and size of the structure into which the elongated member ...

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    6. Systems and methods to remove shadowgraphic flow projections in OCT angiography

      Systems and methods to remove shadowgraphic flow projections in OCT angiography

      Methods and systems for suppressing shadowgraphic flow projection artifacts in OCT angiography images of a sample are disclosed. In one example approach, normalized OCT angiography data is analyzed at the level of individual A-scans to classify signals as either flow or projection artifact. This classification information is then used to suppress projection artifacts in the three dimensional OCT angiography dataset.

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    7. Frustrated total internal reflection fingerprint detector

      Frustrated total internal reflection fingerprint detector

      The device provides an optical coherence tomography system; a first bank of light emitting diodes emitting light centered about a first wavelength; a second bank of light emitting diodes, emitting light centered about a second wavelength; a prism, said prism including a first surface transmissive of the wavelength of the probe beam of the optical coherence tomography system, and a second surface which is also transmissive of the wavelength of the probe beam, and where the second is surface coated from a first edge to a midpoint so to be reflective of light at the first wavelength and transmissive of ...

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    8. Automated analysis of intravascular OCT image volumes

      Automated analysis of intravascular OCT image volumes

      This disclosure provides systems and methods to automatically classify stent struts as covered or uncovered and to measure the thickness of tissue coverage. As one example, the method includes storing three-dimensional image data acquired intravascularly via an optical coherence tomography (OCT) apparatus and detecting struts based on analysis of the image data. Image data corresponding to each of the detected struts is further analyzed automatically to compute an indication of tissue coverage for the stent.

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    9. Intravascular imaging user interface systems and methods

      Intravascular imaging user interface systems and methods

      In part, the disclosure relates to intravascular data collections and generation of representations thereof include one or more view of regions associated with side branches or arteries such as a carina or bifurcation. In one embodiment, accessing a set of intravascular data stored in machine readable memory; performing side branch detection with regard to the intravascular data to identify one or more side branches; and identifying a plurality of frames for the one or more side branches is performed. An automatic viewing angle that is toggleable is used in one embodiment.

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      Mentions: St. Jude Medical
    10. Optical coherence tomographic apparatus, and optical coherence tomographic system

      Optical coherence tomographic apparatus, and optical coherence tomographic system

      Provided is an optical coherence tomographic apparatus, including: a light source configured to generate light; a light splitting unit configured to split the light from the light source into reference light and measuring light; a detection unit configured to detect intensity of combined light obtained by combining the reference light with return light from an object to be inspected, which is irradiated with the measuring light; an image forming unit configured to form a tomographic image of the object to be inspected based on the detected intensity; and a locating unit configured to locate one of a plurality of objective ...

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    11. Interferometric distance measuring arrangement for measuring surfaces and corresponding method with at least two parallel measurement channels and wavelength ramp

      Interferometric distance measuring arrangement for measuring surfaces and corresponding method with at least two parallel measurement channels and wavelength ramp

      The invention relates to an interferometric distance measuring arrangement for measuring surfaces, using at least one laser which can be tuned for generating measurement radiation modulated by a wave length ramp, an optical beam path with an optical transmitting system for emitting the measurement radiation to the surface and an optical capturing system for capturing the measurement radiation back-scattered by the surface, comprising a measuring arm and a reference arm and a radiation detector and an evaluation unit for determining the distance from a reference point of the distance measuring device to the surface. Channels are defined by at least ...

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    12. OCT-IVUS catheter for concurrent luminal imaging

      OCT-IVUS catheter for concurrent luminal imaging

      The invention relates to an apparatus for in vivo imaging. More specifically, the present invention relates to a catheter that incorporates an Optical Coherence Tomography (OCT) system and an Intravascular Ultrasound ("IVUS) system for concurrent imaging of luminal systems, such as imaging the vasculature system, including, without limitation, cardiac vasculature, peripheral vasculature and neural vasculature.

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    13. Systems and methods for quasi-ballistic photon optical coherence tomography in diffusive scattering media using a lock-in camera detector

      Systems and methods for quasi-ballistic photon optical coherence tomography in diffusive scattering media using a lock-in camera detector

      Described herein are systems and methods for noninvasive functional brain imaging using low-coherence interferometry (e.g., for the purpose of creating a brain computer interface with higher spatiotemporal resolution). One variation of a system and method comprises optical interference components and techniques using a lock-in camera. The system comprises a light source and a processor configured to rapidly phase-shift the reference light beam across a pre-selected set of phase shifts or offsets, to store a set of interference patterns associated with each of these pre-selected phase shifts, and to process these stored interference patterns to compute an estimate of the ...

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    14. Systems and methods for combined structure and function evaluation of retina

      Systems and methods for combined structure and function evaluation of retina

      According to one or more embodiments, systems and methods that combine structural examination capabilities of one device with functional examination capabilities of another device to perform a separate or combined structural and functional evaluation of visual functions of the patient's eyes are described herein. A system for combined structural and functional evaluation of a retina may include a structural evaluation unit which may be an OCT, PS-OCT, SLO or PS-SLO and a functional evaluation unit which may be a perimeter, microperimeter, or any other type of visual field analyzer. The structural evaluation unit and the functional evaluation unit may ...

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      Mentions: Nidek
    15. Method for the acquisition of optical coherence tomography image data of retina tissue of an eye of a human subject

      Method for the acquisition of optical coherence tomography image data of retina tissue of an eye of a human subject

      In a method for the acquisition of optical coherence tomography image data of retina tissue of an eye (99) of a human subject using an acquisition device comprising an imaging optics (2), a first image associated with a baseline relative positioning of the eye (99) of the human subject with respect to the imaging optics (2) is acquired at a first point in time. The baseline relative positioning is stored. At a second point in time being different from the first point in time, the baseline relative positioning of the same eye (99) of the same human subject with respect ...

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    16. System and method for the selection of optical coherence tomography slices

      System and method for the selection of optical coherence tomography slices

      The present disclosure describes systems and methods to select fovea containing optical coherence tomography (OCT) images. The systems and methods described herein receive a plurality of OCT images. The portion of the OCT images are selected for further processing, where a line tracing the border between the retina and non-retina tissue is generated. A difference of the line is generated. Candidate OCT images are then generated responsive to the generated difference line. The lowest point among each difference lines generated for each of the OCT images is identified, and the OCT image to which the lowest point corresponds is identified ...

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    17. Optical coherence tomography microscopy apparatus and method for detecting a three-dimensional image of an object

      Optical coherence tomography microscopy apparatus and method for detecting a three-dimensional image of an object

      An optical coherence tomography microscopy apparatus (1) is presented for detecting a three-dimensional image of an optically translucent or reflective sample object (OS), the apparatus comprising an interferometric optical setup including a photo sensor unit (20). A sense signal Si from the photo sensor unit (20) is detected using a detection reference signal. The detection reference signal is derived from a signal indicative for a relative displacement of the sample object (OS) with respect to a reference object.

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    18. Agile imaging system

      Agile imaging system

      An agile optical imaging system for optical coherence tomography imaging using a tunable source comprising a wavelength tunable VCL laser is disclosed. The tunable source has long coherence length and is capable of high sweep repetition rate, as well as changing the sweep trajectory, sweep speed, sweep repetition rate, sweep linearity, and emission wavelength range on the fly to support multiple modes of OCT imaging. The imaging system also offers new enhanced dynamic range imaging capability for accommodating bright reflections. Multiscale imaging capability allows measurement over orders of magnitude dimensional scales. The imaging system and methods for generating the waveforms ...

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    19. Real-time quantification of skin burns in external beam radiation therapy

      Real-time quantification of skin burns in external beam radiation therapy

      A system for radiation therapy include an imaging device (108) configured to scan an area of interest for tissue undergoing radiation therapy to collect one or more images of the tissue. An interpretation module (110) is configured to receive the one or more images of the tissue to determine a burn status of the tissue and provide adjustments for a radiation treatment plan in accordance with the burn status.

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    20. Analysis of optical tomography (OCT) images

      Analysis of optical tomography (OCT) images

      A method includes storing three-dimensional image data acquired intravascularly via an optical coherence tomography (OCT) apparatus. The image data is analyzed to compute a probability estimate of stent presence at support positions appearing in an A-line. Stent strut locations are located in three-dimensional space based on the computed probability estimate of stent presence.

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    21. Probe

      Probe

      A configuration is provided for firmly fixing a transmitting and receiving unit for IVUS and a transmitting and receiving unit for OCT in a probe of an imaging apparatus for diagnosis in which space saving is achieved. The probe includes a cylindrical housing in which an ultrasonic wave transmitting and receiving unit is arranged on a distal side and a light transmitting and receiving unit is arranged on a proximal side. Two signal wires are connected to the ultrasonic wave transmitting and receiving unit and which extend toward the proximal side substantially parallel to each other and which are arranged ...

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    22. Optical coherence tomography apparatus and data processing program

      Optical coherence tomography apparatus and data processing program

      An optical coherence tomography apparatus includes an OCT optical system configured to detect an OCT signal based on measurement light scanned on scan positions of a subject including a blood vessel network by a scanning unit and reference light. The optical coherence tomography apparatus is configured to execute: a signal processing instruction of processing OCT signals which are temporally different from each other with respect to a same position on the subject and generating a motion contrast image which images distribution of a moving object in a depth direction at each of the scan positions based on the OCT signals ...

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      Mentions: Nidek
    23. Method for producing OCT images and other images of an eye including reducing the intensity of reflected light

      Method for producing OCT images and other images of an eye including reducing the intensity of reflected light

      A method for measuring the geometric parameters of the eye. These measurements, known by the term biometrics, are particularly significant for the calculation of intraocular lenses after previous refractive cornea surgery. OCT images and other images are recorded simultaneously, the intensity of the reflected light generated during the OCT image recordings being lower by a factor of 2, by a factor of 10 or by a factor of 100, than the intensity of the illumination light of the other image recordings. The solution provides a method for producing other image recordings, in addition to OCT recordings, in the form of ...

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    24. Signal processing apparatus for eliminating object reflection noise in optical tomographic measurement

      Signal processing apparatus for eliminating object reflection noise in optical tomographic measurement

      A signal processing apparatus is a signal processing apparatus for an optical tomographic measurement apparatus that generates measurement light and reference light and measures a tomographic structure of a measurement object on the basis of a signal intensity of interference light between the reference light and return light of the measurement light from the measurement object. An arithmetic unit is configured to calculate a signal intensity of simple reflection among the return light of the measurement light, the simple reflection being one time of reflection at a plurality of layers virtually set in a depth direction from a surface layer ...

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    1-24 of 1975 1 2 3 4 ... 81 82 83 »
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