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    1. Mentioned In 147 Articles

    2. Image processing apparatus, image processing method, and optical coherence tomography apparatus

      Image processing apparatus, image processing method, and optical coherence tomography apparatus
      An image processing apparatus converts an intensity distribution of at least one of a plurality of regions of a tomographic image of an eye by using an amount of conversion which is greater than an amount of conversion used to convert an intensity distribution of another one of the plurality of regions, the tomographic image being obtained by performing tomographic imaging on the eye by using optical interference.
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    3. Reproducibility of vessel density, fractal dimension and foveal avascular zone using 7 different optical coherence tomography angiography devices

      Reproducibility of vessel density, fractal dimension and foveal avascular zone using 7 different optical coherence tomography angiography devices
      Purpose To evaluate the reproducibility of parafoveal microvascular anatomy of 7 different optical coherence tomography angiography (OCT-A) devices by comparing vessels density (VD), fractal dimension (FD) and foveal avascular zone (FAZ) of superficial and deep capillary plexus in healthy volunteers. Design Reliability analysis. Methods Consecutive healthy volunteers presenting at the Eye Clinic, Department of Biomedical and Clinical Sciences, Luigi Sacco Hospital, University of Milan in the same clinic visit were ...
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    4. Ophthalmic imaging apparatus, control method therefor, and non-transitory computer-readable storage medium

      Ophthalmic imaging apparatus, control method therefor, and non-transitory computer-readable storage medium
      An ophthalmic imaging apparatus performs imaging to produce a tomographic image of a fundus of an examined eye based on interference light obtained by combining measurement light and reference light, determines whether aliasing has occurred in the tomographic image, when it is determined that the aliasing has occurred, moves a position in which an optical path length of the measurement light and an optical path length of the reference light ...
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    5. Retinal movement tracking in optical coherence tomography

      Retinal movement tracking in optical coherence tomography
      The present invention defines a method of correcting for eye movement during optical coherence tomography imaging. The method includes imaging (by scanning) a fundus of an eye to obtain a fundus image (for example, using an SLO); scanning the fundus to obtain a plurality of tomographic images (for example, using OCT); determining, at predetermined intervals, an alignment of the tomographic images with respect to the fundus image, and, if it ...
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    6. Optical interference tomographic apparatus, and method for controlling optical interference tomographic apparatus

      Optical interference tomographic apparatus, and method for controlling optical interference tomographic apparatus
      In order to acquire a tomographic image of the eye to be inspected with high precision even in case where an optical path length and intensity vary depending on a scanned position in an OCT apparatus acquiring the tomographic image of a predetermined part of an object to be inspected, based on the intensity of interference light obtained by combining return light from the object that has been irradiated with ...
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    7. Wavelength tunable laser device and optical coherence tomography apparatus

      Wavelength tunable laser device and optical coherence tomography apparatus
      A wavelength tunable laser device, including: a first reflector; a second reflector; an active layer formed between the first reflector and the second reflector; a quantum well structure layer that exhibits a quantum confined stark effect; and an electrode configured to apply a reverse bias voltage to the quantum well structure layer, wherein the active layer and the second reflector have a gap formed therebetween, the gap having a length ...
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    8. OCT apparatus and method of controlling the same

      OCT apparatus and method of controlling the same
      In an OCT apparatus for obtaining a tomogram using optical interference between signal light and reference light, a first distance between a specific image and a coherence gate is obtained from a first tomogram obtained by imaging. The coherence gate is moved by a set moving distance along a predetermined moving direction. The positional relationship between the specific image and the coherence gate is determined based on the position of ...
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    9. Method and apparatus for tomography imaging

      Method and apparatus for tomography imaging
      A method and apparatus for determining the position of a feature of an object under test in a tomography image are disclosed. The method includes: determining characterizing points, in an additional image, of a feature of the object of interest; determining position data relating to the feature in the additional image based on the detected characterizing points; and identifying a feature of the object of interest in the tomography image ...
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    10. 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 ...
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    11. 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 ...
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    12. 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 ...
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    13. Wavelength tunable light source

      Wavelength tunable light source
      To provide a wavelength tunable light source which can both ensure operation speed and reduce a drive voltage. A wavelength tunable light source according to the present invention includes a pair of reflectors at least one of which is a movable reflector, an active layer provided between the pair of reflectors, and a beam on part of which the movable reflector is formed and which is supported by a support ...
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    14. Medical image processing apparatus for examining an eye to determine the stage of glaucoma

      Medical image processing apparatus for examining an eye to determine the stage of glaucoma
      This invention is directed towards a medical image processing apparatus capable of providing effective information on glaucoma by integrating the tomographic image of the retina obtained by an optical coherence tomograph (OCT: Optical Coherence Tomography) and visual function information obtained by a perimeter. The medical image processing apparatus associates visual field measurement results with a fundus camera image (S420). The medical image processing apparatus registers, on the fundus camera image ...
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    15. Light source and optical coherence tomography apparatus using the same

      Light source and optical coherence tomography apparatus using the same
      A light source includes a control unit that controls currents injected into at least one light emitting region and a light emission spectrum conversion region. The at least one light emitting region includes a first light emitting region and a second light emitting region different from the first light emitting region, light that is emitted from the first light emitting region and passes through the light emission spectrum conversion region ...
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    16. Image pickup apparatus and image pickup method using optical coherence tomography

      Image pickup apparatus and image pickup method using optical coherence tomography
      The present invention relates to an apparatus having a simple configuration capable of correctly detecting malfunction of an OCT apparatus by detecting the states of a light source and a sensor. An image pickup apparatus includes a switching unit that switches between a first mode in which a combined light beam of a return light beam from a specimen and a reference light beam is detectable by a detecting unit ...
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    17. 1-15 of 147 1 2 3 4 5 6 7 8 9 10 »
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  2. About Canon Medical Systems

    Canon Medical Systems

    Cannon Medical Systems Division, U.S.A.  Ophthalmic Systems.  Canon supports synergy between the Company’s retinal camera systems and Optical Coherence Tomography (OCT) products from OPTOPOL Technology S.A.