1. Articles in category: Patents

    1-24 of 1822 1 2 3 4 ... 74 75 76 »
    1. Counter-rotating ophthalmic scanner drive mechanism

      Counter-rotating ophthalmic scanner drive mechanism

      An endoprobe for ophthalmic microsurgical procedures including a hand-piece including a motor, a cannula assembly coupled to the hand-piece, and a transmission system coupling the motor to the cannula assembly is provided. The cannula assembly having an outer tube and an inner tube concentric with the outer tube, each able to rotate about the longitudinal axis and having a proximal end and a distal end. The transmission system rotates the outer tube in a first direction and the inner tube in a second, opposing direction about the longitudinal axis. A method for scanning a light beam along a linear trajectory ...

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    2. Multi-Channel Optical Coherence Tomography

      Multi-Channel Optical Coherence Tomography

      An optical coherence tomography apparatus includes a multi-beam configuration unit comprising at least a first optical path having a first numerical aperture and a second optical path having a second numerical aperture. The multi-beam configuration unit orients the second optical path in a selected orientation in space relative to the first optical path. A scan system illuminates a sample with non-polarized light received from the multi-beam configuration unit and directs light returning from the sample to the first optical path and the second optical path. The multi-beam configuration unit directs light returning from the sample, along the first optical path ...

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    3. Method and device for high resolution full field interference microscopy

      Method and device for high resolution full field interference microscopy

      The invention relates to an incoherent light full field interference microscopy device for the imaging of a volumetric scattering sample (106). The device comprises an interference device (100) between a reference wave (401), produced by reflection of an incident wave by a reflective surface (105) of a reference arm of the interference device, and an object wave (402) produced by backscattering of the incident wave by a slice of the sample, an acquisition device (108) for at least a first interference signal and at least a second interference signal resulting from the interference of the reference and object waves, the ...

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    4. Image processor for intra-surgical optical coherence tomographic imaging of laser cataract procedures

      Image processor for intra-surgical optical coherence tomographic imaging of laser cataract procedures

      A cataract surgical system includes a laser source to generate a first set of laser pulses; a guiding optic to guide the first set of laser pulses to a cataract target region in an eye; a laser controller to generate an electronic representation of a target scan pattern, and to control the guiding optic to scan the first set of laser pulses according to a portion of the target scan pattern to create a first photo-disrupted region in the cataract target region; and a Spectral Domain Optical Coherence Tomographic (SD-OCT) imaging system to generate an image of a portion of ...

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      Mentions: LenSx
    5. Real-time 3D and 4D fourier domain doppler optical coherence tomography system

      Real-time 3D and 4D fourier domain doppler optical coherence tomography system

      An optical coherence tomography imaging system includes a Fourier domain optical coherence tomography sensor system, a signal processing system configured to communicate with the Fourier domain optical coherence tomography sensor system to receive detection signals therefrom and to provide imaging signals, and an image display system configured to communicate with the signal processing system to receive the imaging signals. The signal processing system includes a parallel processor configured to calculate structure information and Doppler information from the detection signals in real time such that the imaging signals provide a real time display of combined structure and flow of an object ...

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    6. Image processing apparatus, control method, and optical coherence tomography system

      Image processing apparatus, control method, and optical coherence tomography system

      In an image processing apparatus, Whether image quality of a tomographic image corresponding to a predetermined position in an imaging target captured by an optical coherence tomography apparatus is within a predetermined range is determined, an instruction whether to permit the image capturing in the predetermined position is issued to the optical coherence tomography apparatus according to a determination that the image quality is out of the predetermined range, and a new tomographic image is generated by combining the tomographic image obtained according to the instruction and the tomographic image whose image quality is determined.

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    7. Diagnostic Device For Dermatology With Merged Oct And Epiluminescence Dermoscopy

      Diagnostic Device For Dermatology With Merged Oct And Epiluminescence Dermoscopy

      Systems and methods for use of the imaging system are presented. In an embodiment, the imaging system includes a first optical path, a second optical path, a plurality of optical elements, a detector, and a processor. The first optical path guides a first beam of radiation associated with epiluminescence while the second optical path guides a second beam of radiation associated with optical coherence tomography.

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    8. Fundus Analysis Device And Fundus Analysis Program

      Fundus Analysis Device And Fundus Analysis Program

      Provided is information useful for a diagnostic aid. A fundus analysis device for processing tomographic images acquired by an optical coherence tomography device for obtaining tomographic images of the fundus of an eye that is being tested and acquiring layer thickness information for the fundus of the eye being tested, the fundus analysis device being provided with: a first database for storing fundus layer thickness information relating to multiple eyes that have long ocular axis lengths; an acquiring means for acquiring tomographic images of the fundus of the eye being tested using an optical coherence tomography device; and an analysis ...

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      Mentions: Nidek
    9. Multimodality correlation of optical coherence tomography using secondary reference images

      Multimodality correlation of optical coherence tomography using secondary reference images

      Reference images from one or more OCT scanners are correlated with associated OCT scan data, which is in turn registered and correlated to a wide field image so as to present the OCT scan data registered and aligned to the correct location on the wide field image so as to permit displaying OCT scan data taken at different times or on different machines on a single screen all registered to the wide field image.

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    10. System and method for rapid OCT image acquisition using compressive sampling

      System and method for rapid OCT image acquisition using compressive sampling

      A method for rapid OCT image acquisition includes acquiring by OCT a plurality of compressive measurements (y) representing a set of under-sampled OCT data in a Dirac domain below a Nyquist rate by sampling an object of interest at randomly spaced vertical and horizontal lines in a Cartesian geometry using a raster scan, and recovering a 3D volumetric OCT image (f) from the compressive measurements (y) using compressive sampling. The method may also include recovering the 3D volumetric OCT image (f) from the compressive measurements (y) based at least in part on a sparsifying matrix (S) capable of transforming the ...

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    11. Method and apparatus for ultrahigh sensitive optical microangiography

      Method and apparatus for ultrahigh sensitive optical microangiography

      Embodiments herein provide an ultrahigh sensitive optical microangiography (OMAG) system that provides high sensitivity to slow flow information, such as that found in blood flow in capillaries, while also providing a relatively low data acquisition time. The system performs a plurality of fast scans (i.e., B-scans) on a fast scan axis, where each fast scan includes a plurality of A-scans. At the same time, the system performs a slow scan (i.e., C-scan), on a slow scan axis, where the slow scan includes the plurality of fast scans. A detector receives the spectral interference signal from the sample to ...

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    12. Optical coherence tomography apparatus, image processing apparatus, image processing method, and storage medium of program

      Optical coherence tomography apparatus, image processing apparatus, image processing method, and storage medium of program

      An optical coherence tomography apparatus includes a generation unit configured, based on interfering light produced by interfering a return beam and a reference beam of light emitted toward the object to be measured, to generate tomographic images of an object to be measured, an image processing unit configured to perform image processing for increasing image quality to at least one of the tomographic images generated by the generation unit, and a display control unit configured to display one of the tomographic images generated by the generation unit and then display the image on which the image processing is performed by ...

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    13. System and method for optimization of coherence length of tunable laser sources

      System and method for optimization of coherence length of tunable laser sources

      A system and method for adjusting the coherence length of a tunable laser to optimize measurements and reduce artifacts. A tuning element of the laser system modulates, adjusts, or controls parameters associate with the tunable laser, such that the output wavelength of the tunable laser is modulated or adjusted over a wavelength range within a time interval. Modulation of the parameter has the effect of increasing a linewidth of the tunable laser.

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    14. WAVELENGTH-ENCODED Tomography

      WAVELENGTH-ENCODED Tomography

      Systems and methods for non-invasive optical imaging are provided. One or more time-lenses can be utilized to perform an optical Fourier transform, and the time-to-wavelength conversion can generate a wavelength-encoded image of optical scattering, analogous to optical coherence tomography. This optical Fourier transform provides improved axial resolution and simplifies digital signal processing after data acquisition.

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    15. A NANO-SENSITIVE FOURIER-DOMAIN Optical Coherence Tomography Inspection System

      A NANO-SENSITIVE FOURIER-DOMAIN Optical Coherence Tomography Inspection System

      ntroduction The invention relates to inspection of a variety of objects, including body tissue (also in vivo), cell cultures, materials for material science, and micro and nano electronics components, for example. Most of the fundamental pathological processes in living tissues, including cancer, exhibit changes at the nanoscale level. Recently the diffraction resolution limit has been broken and optical nanoscale microscopy has led to creation of nanoscopic medicine. However, nanoscopy largely requires labelling, is limited to superficial 2D imaging, and is not in general suitable for in vivo applications. Furthermore, it is currently believed that in many cases 2D biology does ...

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    16. Integrated Ultrasound, OCT, PA AND/OR Florescence Imaging Endoscope For Diagnosing Cancers In Gastrointestinal, Respiratory, And Urogenital Tracts

      Integrated Ultrasound, OCT, PA AND/OR Florescence Imaging Endoscope For Diagnosing Cancers In Gastrointestinal, Respiratory, And Urogenital Tracts

      A multimodality imaging system including ultrasound, optical coherence tomography (OCT), photoacoustic (PA) imaging, florescence imaging and endoscopic catheter for imaging inside the gastrointestinal tract with real-time automatic image co-registration capability, including: an ultrasound subsystem for imaging; an optical coherence tomography (OCT) subsystem for imaging, a PA microscopy or tomography subsystem for imaging and a florescence imaging subsystem for imaging. An invasive interventional imaging device is included with an instrumentality to take a tissue biopsy from a location visible on the ultrasound subsystem for imaging, on the optical coherence tomography (OCT) subsystem for imaging, photoacoustic (PA) subsystem for imaging and florescence ...

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    17. Method And System For Improving Aiming During Optical Coherence Tomography On Young Children By Synchronization With Retinal Bifringence Scanning

      Method And System For Improving Aiming During Optical Coherence Tomography On Young Children By Synchronization With Retinal Bifringence Scanning

      The present invention is directed to a method and system for improved aiming during Optical Coherence Tomography (OCT) on young children and those unable to cooperate with OCT imaging by synchronization with retinal birefringence scanning (RBS). OCT is performed without knowing whether or not the subject is looking at the intended target.

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    18. Method For Detecting Corneal Astigmatism Using Optical Coherence Tomography

      Method For Detecting Corneal Astigmatism Using Optical Coherence Tomography

      The invention relates to a method for detecting refractive errors in the eye, said errors being attributable to a suboptimal surface shape of the front surface and/or rear surface of the cornea of an eye. In the method according to the invention for determining refractive errors in the eye, an OCT volume scan and/or one or more OCT line scans of the front eye section are carried out; using the measured values, the front and rear surface of the cornea are detected by means of an edge detection process; the topography of the front and rear surface of ...

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    19. Displaying extracted structures from an OCT image superimposed on an eyeground image

      Displaying extracted structures from an OCT image superimposed on an eyeground image

      An image processing apparatus includes an extraction unit configured to extract a structure of a tested eye from an OCT image obtained by optical coherence tomography, an extraction unit configured to extract a structure of the tested eye from an eyeground image obtained by a scanning laser ophthalmoscope or a fundus camera, a calculation unit configured to calculate a reliability degree of the extraction for each of the extracted structures, and a display control unit configured to display the extracted structures superimposed on a image of eyeground according to the calculated reliability.

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    20. System and method for stabilizing mode locked swept laser for OCT medical imaging

      System and method for stabilizing mode locked swept laser for OCT medical imaging

      An optical coherence analysis system uses a laser swept source that is constrained to operate in a stable mode locked condition by modulating a drive current to the semiconductor optical amplifier as function of wavelength or synchronously with the drive voltage of the laser's tunable element based on stability map for the laser.

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    21. Image apparatus and control method thereof configured to determine optical probe abnormality

      Image apparatus and control method thereof configured to determine optical probe abnormality

      An imaging apparatus generates a cross-sectional image in the longitudinal direction inside a body cavity (e.g., blood vessel) by using an interference signal. The apparatus includes an obtaining unit for obtaining line data, and a judgment unit for judging whether or not the optical probe unit operates in a normal state based on existence or non-existence of intensity change in at least a portion of signals within the obtained line date, based on existence or non-existence of change of position in the depth direction in which the portion of signals appear, or based on change quantity per unit time ...

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    22. Imaging Device And Method For Eye Ground Imaging By Optical Coherence Tomography

      Imaging Device And Method For Eye Ground Imaging By Optical Coherence Tomography

      SUBSTANCE: group of inventions refers to medicine, namely to eye ground imaging devices. The device comprises an optical unit concentrating light beams from measuring light beam lines on first and second radiation location on the eye ground. Further, a control unit manages a scanning unit so that the light beams concentrated on the first and second radiation locations are used for scanning in the first and second scan regions of the eye ground and so that the first and second scan regions are overlapped to form an overlap region. A tomography data collector receives first tomography data and second tomography ...

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    23. Six-dimensional Optical Multilayer Storage Using Two-photon Absorption Writing, Erasing and Optical Coherence Tomography Reading

      Six-dimensional Optical Multilayer Storage Using Two-photon Absorption Writing, Erasing and Optical Coherence Tomography Reading

      This invention relates a method of six-dimensional optical multilayer storage using two-photon absorption writing, erasing and optical coherence tomography reading and the apparatus designed based on this method. The invented system stores data in three spatial dimensions plus three physical dimensions of wavelength, intensity and polarization.

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    24. Microscope System, And Method For Providing Augmented Reality Images Of Microscope System

      Microscope System, And Method For Providing Augmented Reality Images Of Microscope System

      Provided is a microscope system. The system comprises: an optical microscope unit for collecting a surface image of an object to be examined; an OCT unit for collecting an optical coherence tomography image of the object to be examined; a PA unit for collecting a photoacoustic image of the object to be examined; an image processing unit for generating an augmented reality image by superimposing the optical coherence tomography image and the photoacoustic image over the surface image; and an image observation unit for making the augmented reality image visible.

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    1-24 of 1822 1 2 3 4 ... 74 75 76 »
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