1. Articles in category: Patents

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    1. Improvements In Or Relating To Scanning Laser Ophthalmoscopes

      Improvements In Or Relating To Scanning Laser Ophthalmoscopes

      A scanning laser ophthalmoscope (SLO) for imaging the retina of an eye comprises a source (12) of collimated light, a scanning device (14, 16, 1328, 1319), a scan transfer device (20) and a detector (1310). The scan transfer device has a first focus (16) at which an apparent point source is provided and a second focus (24) at which an eye (524, 1324) may be accommodated. The scan transfer device transfers a two-dimensional collimated light scan from the apparent point source into the eye. An optical coherence tomography (OCT) system (900) is combined with the SLO, the OCT system providing ...

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    2. Ophthalmologic Observation Device

      Ophthalmologic Observation Device

      Provided is an ophthalmologic observation device capable of both acquiring a front image of a subject's eye and OCT measurement thereof in a favorable focus state. An ophthalmologic observation device of an embodiment comprises a photographic optical system, a measurement optical system, an optical path combining unit, a first drive unit, a second drive unit and a control unit. The photographic optical system includes a first focusing lens and performs imaging to acquire a front image of a subject's eye. The measurement optical system includes a second focusing lens and conducts optical coherence tomography measurement to acquire a ...

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    3. Light Source And Optical Coherence Tomography Apparatus Including The Light Source

      Light Source And Optical Coherence Tomography Apparatus Including The Light Source

      A light source includes an upper electrode layer, a lower electrode layer, and an active layer interposed therebetween. At least one of the upper and lower electrode layers is divided into a plurality of electrodes separated from each other in an in-plane direction of the active layer. The separated electrodes independently inject current into a plurality of different regions in the active layer. The light source emits light by injecting current from the upper and lower electrode layers into the active layer, guide the light in the in-plane direction, and output the light. The plurality of different regions in the ...

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    4. Optical Semiconductor Device, Driving Method Thereof, And Optical Coherence Tomography Apparatus Having The Optical Semiconductor Device

      Optical Semiconductor Device, Driving Method Thereof, And Optical Coherence Tomography Apparatus Having The Optical Semiconductor Device

      The present invention provides an optical semiconductor device which can make a wavelength band of emitted light wider than that of a conventional optical semiconductor device. The optical semiconductor device includes: an active layer including a multiple quantum well structure; and at least one electrode pair for injecting an electric current into the active layer, wherein the multiple quantum well structure has a first quantum well and a second quantum well which is different from the first quantum well, and the first quantum well and the second quantum well are mutually different in at least two out of a composition ...

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    5. Method For The Reliable Determination Of The Axial Length Of An Eye

      Method For The Reliable Determination Of The Axial Length Of An Eye

      The present invention relates to a method for determining the axial length of an eye by means of optical coherence tomography (OCT), in which the alignment of the measuring instrument to the eye is monitored for all one-dimensional or two-dimensional scans so as to be able to guarantee a reliable determination of the axial length of the eye. In the method according to the invention, B-scans are carried out following alignment of the visual axis of the eye to the main measuring axis of the measuring instrument, from which scans the retinal tissue structures are detected in order to determine ...

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    6. Diagnostic Imaging Device, Information Processing Device, And Method For Controlling Diagnostic Imaging Device And Information Processing Device

      Diagnostic Imaging Device, Information Processing Device, And Method For Controlling Diagnostic Imaging Device And Information Processing Device

      The present invention enables the diagnosis of biological tissue to be performed with high precision while suppressing the visual loss of information possessed by an ultrasound cross-sectional image and an optical cross-sectional image, which correspond to each other in the biological tissue, when the ultrasound cross-sectional image and optical cross-sectional image are displayed. Thus, an optical coherence tomography (OCT) cross-sectional image and an intravascular ultrasound (IVUS) cross-sectional image are displayed side by side. When there is a specific input operation from a user in this situation, the OCT cross-sectional image and the IVUS cross-sectional image are exchanged and displayed.

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    7. Filtered ASE swept source for OCT medical imaging

      Filtered ASE swept source for OCT medical imaging

      An integrated swept wavelength optical source uses a filtered ASE signal with an optical amplifier and tracking filter. This source comprises a micro optical bench, a source for generating broadband light, a first tunable Fabry Perot filter, installed on the bench, for spectrally filtering the broadband light from the broadband source to generate a narrowband tunable signal, an amplifier, installed on the bench, for amplifying the tunable signal, and a second tunable Fabry Perot filter, installed on the bench, for spectrally filtering the amplified tunable signal from the amplifier. A self-tracking arrangement is also possible where a single tunable filter ...

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    8. Optical coherence tomography (OCT) imaging systems for use in ophthalmic applications

      Optical coherence tomography (OCT) imaging systems for use in ophthalmic applications

      Optical coherence tomography (OCT) imaging systems for imaging an eye are provided including a source having an associated source arm path and a reference arm having an associated reference arm path coupled to the source path, the reference arm path having an associated reference arm path length. A sample having an associated sample arm path coupled to the source arm and reference arm paths is provided. A reference arm path length adjustment module is coupled to the reference arm. The reference arm path length adjustment module is configured to automatically adjust the reference arm path length such that the reference ...

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    9. Optical interference measuring method and optical interference measuring apparatus

      Optical interference measuring method and optical interference measuring apparatus

      In an optical interference measuring method according to the present invention, light emitted from a light source unit is split into measuring light and reference light, coherent light is detected that is obtained by interference of the reference light and the measuring light reflected from or scattered rearward from a measuring object, an optical-path length adjustment mechanism provided in the optical path of the reference light is driven to change the optical path length of the reference light, it is decided whether an image based on the detected coherent light is a normal image or a folded image based on ...

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      Mentions: Panasonic
    10. System and method for optical coherence tomography

      System and method for optical coherence tomography

      The invention relates to a system and to a corresponding method for optical coherence tomography having an interferometer (10) which has a beam splitter (13), a first reflector (11) and a reflector (12) the optical distance (I) of which from the beam splitter (13) is changeable by a speed (v), and a detector (30) for collecting light which is reflected by a specimen (1) to be examined. In order to reduce the times required for the most reliable possible recording of interference patterns, provision is made such that the intensity of the light (14 or 4) injected into the interferometer ...

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      Mentions: AGFA Healthcare
    11. Integrated dual swept source for OCT medical imaging

      Integrated dual swept source 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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    12. System And Method For Optical Coherence Tomography And Positioning Element

      System And Method For Optical Coherence Tomography And Positioning Element

      The invention relates to a system and a corresponding method for the optical coherence tomography comprising an interferometer and a sensor head, by means of which electromagnetic radition can be emitted from the interferometer to an object to be examined and electromagnetic radiation reflected by the object fed back into the interferometer, a positioning element (3) for positioning the sensor head relative to the object to be examined comprising a support which can be arranged on the object and on which the sensor head can be placed, and a first region (4), which is essentially permeable for the radiation emitted ...

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      Mentions: AGFA Healthcare
    13. Quantification Of Local Circulation With Oct Angiography

      Quantification Of Local Circulation With Oct Angiography

      Impaired intraocular blood flow within vascular beds in the human eye are associated with certain ocular diseases including, for example, glaucoma, diabetic retinopathy and age-related macular degeneration. A reliable method to quantify blood flow in one or more of the various intraocular vascular beds could provide insight into the vascular component of ocular disease pathophysiology.

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    14. MOTION-COMPENSATED Optical Coherence Tomography System

      MOTION-COMPENSATED Optical Coherence Tomography System

      A motion-compensated optical coherence tomography system includes an optical coherence tomography sensor that includes a common-path optical fiber having an end for emitting light, reflecting reference light and receiving returned light for detection; a motion-compensation system attached to the common-path optical fiber and operable to move at least a portion of the optical fiber so as to compensate for motion between the end of the common-path optical fiber and an object being imaged; and a feedback control system configured to communicate with the optical coherence tomography sensor and the motion-compensation system. The feedback control system is configured to receive information ...

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    15. WAVENUMBER-LINEARIZED Spectrometer On Chip In A SPECTRAL-DOMAIN Optical Coherence Tomography System

      WAVENUMBER-LINEARIZED Spectrometer On Chip In A SPECTRAL-DOMAIN Optical Coherence Tomography System

      Various embodiments of apparatuses, systems and methods are described herein related to a spectrometer that can generate a plurality of narrowband optical signals having a wavenumber linear format without using an increased number of optical components and without an increase in signal processing.

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    16. Optical Coherence Tomography Control Systems And Methods

      Optical Coherence Tomography Control Systems And Methods

      In part, the invention relates to methods, devices, and systems suitable for controlling a light source (7). The light source is configured for use in a data collection system such as an optical coherence tomography system (5). The light source (7) can be controlled with a drive waveform (10, 22, 55, 70). Linearizing and symmetrizing parameters of the light source (7) such as forward (35, 60, 75) and backward (33, 63, 77) scan durations is achieved using a suitable drive waveform (22, 55, 70).

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    17. Method and system for avoiding package induced failure in swept semiconductor source

      Method and system for avoiding package induced failure in swept semiconductor source

      Dry oxygen, dry air, or other gases such as ozone are hermetically sealed within the package of the external cavity laser or ASE swept source to avoid packaging-induced failure or PIF. PIF due to hydrocarbon breakdown at optical interfaces with high power densities is believed to occur at the SLED and/or SOA facets as well as the tunable Fabry-Perot reflector/filter elements and/or output fiber. Because the laser is an external cavity tunable laser and the configuration of the ASE swept sources, the power output can be low while the internal power at surfaces can be high leading ...

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    18. Method For Measuring An Eye

      Method For Measuring An Eye

      A method for measuring the axial length of an eye using optical coherence tomography, during which a plurality of A-scans of the OCT measurement are combined to an axial length, taking into account the alignment with which they were obtained, and taking into account the topography of the cornea. The distance of the front of the cornea from the retina is determined using OCT while measuring or controlling the alignment of the measuring device to the eye in that the topography of the front of the cornea is measured or made available. The calculation of an axial length from an ...

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    19. Flowometry In Optical Coherence Tomography For Analyte Level Estimation

      Flowometry In Optical Coherence Tomography For Analyte Level Estimation

      Optical coherence tomography (herein “OCT”) based analyte monitoring systems are disclosed. In one aspect, techniques are disclosed that can identify fluid flow in vivo (e.g., blood flow), which can act as a metric for gauging the extent of blood perfusion in tissue. For instance, if OCT is to be used to estimate the level of an analyte (e.g., glucose) in tissue, a measure of the extent of blood flow can potentially indicate the presence of an analyte correlating region, which would be suitable for analyte level estimation with OCT. Another aspect is related to systems and methods for ...

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    20. Optical tomographic imaging apparatus and imaging method for optical tomographic image

      Optical tomographic imaging apparatus and imaging method for optical tomographic image

      Provided are an optical tomographic imaging apparatus and an imaging method for an optical tomographic image, in which high measurement sensitivity and high lateral resolution of a specific portion of an object may be obtained with a simple structure. The optical tomographic imaging apparatus of a Fourier-domain method includes: an optical path length adjustment portion for adjusting an optical path length of the reference beam; a position adjustment portion for adjusting a position of a focusing device for focusing the measuring beam onto the object; and a drive control portion for controlling drive of the optical path length adjustment portion ...

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    21. Apparatus and method for real-time imaging and monitoring of an electrosurgical procedure

      Apparatus and method for real-time imaging and monitoring of an electrosurgical procedure

      An optical coherence tomography probe and laser combination device configured for real-time z-directional guidance of the incisional depth of a surgical procedure. It can be used alone or placed within the working channel of an endoscope. The device includes an OCT single mode fiber, and a laser fiber or laser hollow waveguide or electrical surgical wire positioned adjacent to the OCT single mode fiber. The single mode fiber is configured to move laterally when activated by an actuator to scan light data reflected from a sample that is positioned in front of a distal end of the device. The light ...

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    22. Systems for processing images generated using fourier domain optical coherence tomography (FDOCT)

      Systems for processing images generated using fourier domain optical coherence tomography (FDOCT)

      Methods, systems and computer program products for managing frequency domain optical coherence tomography (FDOCT) image resolution. A spectrum used to acquire an image of a subject is calibrated and default dispersion correction parameters are set. Default dispersion management parameters associated with a region of the image of the subject are also set. The image of the subject is acquires after setting the default dispersion correction parameters and the default dispersion management parameters. A quality of the acquired image is compared to a quality metric for the acquired image. The dispersion correction parameters are adjusted if the quality of the acquired ...

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    23. Occlusion-crossing devices, imaging, and atherectomy devices

      Occlusion-crossing devices, imaging, and atherectomy devices

      The present invention relates to: (1) guidewire support/placement catheters; (2) support/placement catheters with imaging; (3) atherectomy catheters, (4) atherectomy catheters with imaging, (5) occlusion crossing catheters, and (6) occlusion crossing catheters with imaging as well as methods for using them to treat disorders (and particularly peripheral artery disease) and systems including them.

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    1-24 of 1609 1 2 3 4 ... 65 66 67 »
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