1. Articles in category: Patents

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    1. Binocular en face optical coherence tomography imaging

      Binocular en face optical coherence tomography imaging

      Binocular en face OCT imaging during ophthalmic surgery may be performed with an OCT scanning controller that interfaces to an OCT scanner used with a surgical microscope. The OCT scanner may generate left and right sample beams, and receive left and right measurement beams, respectively, to generate left and right scan data. The OCT scanning controller may process the left and right scan data to generate left and right en face images for respective viewing from binoculars in the surgical microscope to obtain an intraoperative stereoscopic en face view of interior portions of the eye.

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    2. System for coregistration of optical coherence tomography and angiographic X-ray image data

      System for coregistration of optical coherence tomography and angiographic X-ray image data

      A system comprises a catheter including a lens, for acquiring optical coherence tomography images within the vessel of interest as the catheter is being retracted from the vessel in the presence of contrast agent. An X-ray imaging system interface receives a first set of X-ray images of an anatomical region including the vessel of interest containing the catheter. The first set of X-ray images are acquired at points corresponding to the particular points within a heart cycle, while the catheter is stationary in the vessel, in response to a heart electrical activity representative signal and in the absence of contrast ...

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      Mentions: Siemens
    3. Method for analyzing an object using a combination of long and short coherence interferometry

      Method for analyzing an object using a combination of long and short coherence interferometry

      A method for high dynamic range and high accuracy interferometry measurements is described. The method uses a broadband light source for generating light, an interferometer, a phase shifting device, an imaging optical system and a detector array for collecting and measuring the reflected light from an object. The detected light is processed by a processor unit to obtain the object's surface.

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    4. Quantitative retinal autofluorescence mapping with multimodal imaging technology

      Quantitative retinal autofluorescence mapping with multimodal imaging technology

      Imaging systems and methods of using the same are provided for monitoring the quantity of fluorescent pigment, for example lipofuscin, in the retinal pigment epithelium (RPE) layer of a retina in vivo. Various imaging modalities can be integrated into a single system and excited by a single broadband light source for the monitoring of the fluorescent pigment. The influence of varying optical properties found in the optical path of the pigment's auto-fluorescence between the RPE and an image receiver can be corrected.

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    5. Ophthalmologic observation apparatus using optical coherence tomography

      Ophthalmologic observation apparatus using optical coherence tomography

      A measuring optical system of an ophthalmologic observation apparatus of an embodiment performs OCT of an eye. An image forming part forms an image based on information acquired by OCT. A preliminary operation performing part performs a plurality of preliminary operations for OCT. Storage stores, for at least one specific preliminary operation among the plurality of preliminary operations, operating condition information including a transferring condition for transferring to a different preliminary operation and a terminating condition for terminating a specific preliminary operation in advance. A controller controls the preliminary operation performing part to commence a specific preliminary operation, controls the ...

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    6. Self-referenced optical coherence tomography

      Self-referenced optical coherence tomography

      Systems and methods that use interference signal from a sample tissue (e.g. retina) obtained in a self-referenced manner to obtain one or more characteristics about the sample tissue, such as thickness and intensity information, are discussed in the present disclosure. One example method of analyzing the sample tissue using an interferometry system includes illuminating the sample tissue with a beam of light using a spectrally broadband source. Scattered light signal is collected from the sample tissue at a detector. The signal results from optical interference between light scattered from multiple scatterers located at different depths in the tissue. The ...

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    7. Ophthalmologic observation apparatus

      Ophthalmologic observation apparatus

      An ophthalmologic observation apparatus of an embodiment includes a photographing optical system, measuring optical system, optical-path coupler, first and second drivers and controller. The photographing optical system includes a first focusing lens and performs photography for acquiring a front image of an eye. The measuring optical system includes a second focusing lens and performs OCT for acquiring a cross-sectional image of the eye. The optical-path coupler couples optical paths of the photographing optical system and measuring optical system at a location on the eye side than the first and second focusing lenses. The first driver moves the first focusing lens ...

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    8. Surgical instrument and systems with integrated optical sensor

      Surgical instrument and systems with integrated optical sensor

      A surgical instrument has a surgical tool that has a proximal end and a distal end, and an optical sensor that has at least a portion attached to the surgical tool. The surgical tool has a portion that is suitable to provide a reference portion of the surgical tool, and the optical sensor has an end fixed relative to the reference portion of the surgical tool such that the reference portion of the surgical tool can be detected along with tissue that is proximate or in contact with the distal end of the surgical tool while in use.

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    9. Guarded imaging devices and methods

      Guarded imaging devices and methods

      An integrated therapeutic and imaging device that uses at least two balloons to provide a guarded zone that can be evacuated and replaced with a fluid that is sufficiently clear to permit optical coherence tomography (or even high resolution ultrasound) imaging that would otherwise be of poor quality or impossible. Methods of making and operating the imaging device to obtain clear, high quality images, as well as treating a patient's tissue with the device within a living body in association with obtaining an image of the patient's tissue, are included.

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    10. Instrument tracking in OCT-assisted surgery

      Instrument tracking in OCT-assisted surgery

      Systems and methods are provided for a microscope-integrated intraoperative scanner system having automated tracking of an instrument tip. A scanning mirror is configured such that a field of view of the OCT system is determined by a position or orientation of the scanning mirror. A drive system is configured to control the scanning mirror. Camera assemblies are configured to determine respective two-dimensional projections of the positions of markers attached to a surgical instrument. A stereo vision system is configured to determine a three-dimensional location of each of the markers from the determined two-dimensional positions. An instrument tracking component is configured ...

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    11. Optical probe and optical coherence tomography apparatus including the same

      Optical probe and optical coherence tomography apparatus including the same

      An optical probe for irradiating light onto a subject includes an optical path control unit configured to receive light from outside the optical probe, and change a path of the light within the optical probe; an optical path length control element configured to receive the light having the changed path from the optical path control unit, and change an optical path length of the light as the optical path control unit changes the path of the light; and an optical output unit configured to receive the light having the changed optical path length from the optical path length control element ...

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      Mentions: Samsung
    12. Dispersion compensation

      Dispersion compensation

      In a OCT interferometer it is necessary to balance dispersion within the reference arm with dispersion within the object arm. This is normally done by replicating within the reference arm the components found in the object arm. This adds to the complexity and cost of the OCT interferometer. A method is provided for determining the design of and designing a simplified OCT interferometer, in which the reference arm contains only a single piece of glass of a single glass type. This reduces the cost and complexity of the OCT interferometer, and reduces power loss and undesired reflections within the reference ...

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    13. Method and apparatus for geometric correction of OCT data representing a scan obtained by means of optical coherence tomography imaging of a sample

      Method and apparatus for geometric correction of OCT data representing a scan obtained by means of optical coherence tomography imaging of a sample

      System and method for geometric correction of OCT data representing a scan obtained by means of optical coherence tomography imaging of a sample. First scan morphological data relating to a morphology of the sample in the scan are obtained. Then reference morphological data relating to a reference morphology of the sample are obtained. For each of one or more scans of OCT data scan morphological data are compared with the reference morphological data to determine a relative geometric transformation of the morphology of the scan with respect to the reference morphology. Corrected scan is generated by performing on the OCT ...

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    14. Ophthalmologic imaging apparatus and optical unit attachable to the same

      Ophthalmologic imaging apparatus and optical unit attachable to the same

      An optical system of an ophthalmologic imaging apparatus of embodiment splits light from a first light source into measurement light and reference light and detects interference light of returned light of measurement light from an eye and reference light. An image forming part forms an image based on detection result from the optical system. The optical unit includes a lens and joining member. The lens is locatable in an optical path of measurement light and used for changing a focus position of measurement light from a first site of the eye to second site. The joining member joins an optical ...

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    15. Friction torque limiter for an imaging catheter

      Friction torque limiter for an imaging catheter

      The invention provides a frictional torque limiter assembly for an imaging core spinning in a patient's body. The torque limiter assembly torsionally isolates the imaging core from a motor that spins the imaging core. An interference fit between a slitted drive tube and a spacer tube acts as a clutch that allows a spinning imaging probe to slow or stop relative to the motor until the motor is stopped, thereby preventing an unsafe condition.

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      Mentions: St. Jude Medical
    16. Multi-channel optical coherence tomography probe for use in a medical procedure

      Multi-channel optical coherence tomography probe for use in a medical procedure

      A multi-channel optical coherence tomography probe for use in a medical procedure is provided. The probe comprises: a plurality of first optical fibers optically connectable to an OCT light source; a plurality of second optical fibers different from the plurality of first optical fibers; a scanning device comprising: an actuator configured to rotationally move the plurality of second optical fibers between a first position and a second position, relative to the plurality of first optical fibers; and, a mirror configured to, as the plurality of second optical fibers is moving rotationally, convey light from exit faces of the plurality of ...

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    17. Forward scanning-optical probes, circular scan patterns, offset fibers

      Forward scanning-optical probes, circular scan patterns, offset fibers

      An optical light scanning probe is presented, the probe comprising a handle, shaped for grasping by a user; a cannula, protruding from a distal portion of the handle with an outer diameter smaller than 20 gauge; an optical fiber with a distal fiber-portion off a probe-axis, configured to receive a light from a light-source at a proximal fiber-portion, and to emit the received light at the distal fiber-portion; a fixed beam forming unit, disposed at a distal portion of the cannula, configured to receive the light from the distal fiber-portion, and to deflect the received light toward a target region ...

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    18. Ophthalmic apparatus

      Ophthalmic apparatus

      An ophthalmic apparatus includes a deforming unit and a generation unit. The deforming unit deforms a shape of a boundary that defines a region of a tomographic image of a subject eye in a depth direction according to a thickness of a layer in which the boundary is positioned. The generation unit generates an en-face image based on the region in the depth direction defined by the shape of the boundary deformed by the deforming unit.

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    19. Dispersion encoded full range optical coherence tomograph

      Dispersion encoded full range optical coherence tomograph

      An apparatus for optical coherence tomography (OCT) comprises a light source, a first arm, a second arm, and a processing unit. The first arm has a first dispersive optical assembly that induces a first amount of dispersion into light from the light source and traversing the first arm, where the first arm is one of a sample arm and a reference arm of an interferometer. The second arm has a second dispersive optical assembly that induces a second amount of dispersion into light from the light source and traversing the second arm, where the second arm is the other of ...

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      Mentions: Ole Massow
    20. Intravascular Measurement and Data Collection Systems, Apparatus and Methods

      Intravascular Measurement and Data Collection Systems, Apparatus and Methods

      A method and apparatus for determining properties of a tissue or tissues imaged by optical coherence tomography (OCT). In one embodiment the backscatter and attenuation of the OCT optical beam is measured and based on these measurements and indicium such as color is assigned for each portion of the image corresponding to the specific value of the backscatter and attenuation for that portion. The image is then displayed with the indicia and a user can then determine the tissue characteristics. In an alternative embodiment the tissue characteristics is classified automatically by a program given the combination of backscatter and attenuation ...

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      Mentions: St. Jude Medical
    21. MICRO-MOLDED Anamorphic Reflector Lens For Image Guided THERAPEUTIC/DIAGNOSTIC Catheters

      MICRO-MOLDED Anamorphic Reflector Lens For Image Guided THERAPEUTIC/DIAGNOSTIC Catheters

      A catheter system for optical coherence tomography includes an elongate catheter body, an optical fiber in the elongate catheter body, and an anamorphic lens assembly coupled with a distal end of the optical fiber. The optical fiber and the lens assembly are together configured to provide a common path for optical radiation reflected from a target and from a reference interface between the distal end of the optical fiber and the lens assembly

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    22. Image Processing Apparatus, Optical Coherence Tomography Apparatus, Image Processing Method, And COMPUTER-READABLE Storage Medium

      Image Processing Apparatus, Optical Coherence Tomography Apparatus, Image Processing Method, And COMPUTER-READABLE Storage Medium

      An image processing apparatus that processes a tomographic image generated by using tomographic signals acquired by subjecting a subject to optical coherence tomographic imaging, includes an acquiring unit configured to acquire the tomographic signals, and a generation unit configured to generate a tomographic image based on a representative value in each pixel position of the tomographic image, generated by using the tomographic signals, the generation unit includes a region determination unit configured to determine a target region where contrast is reduced in the tomographic image, by using tomographic signals, and an estimation unit configured to estimate an estimation value, by ...

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    23. Data processing method and OCT apparatus

      Data processing method and OCT apparatus

      According to one embodiment, a data processing method is used for processing collected data acquired with respect to each A-line by swept-source OCT using a wavelength sweeping light source having a predetermined wavelength sweeping range. The data processing method detects a reference signal assigned in advance to a clock, the wavenumber of which linearly varies along the time axis, in a predetermined wavelength position within the predetermined wavelength sweeping range. Then, the data processing method sequentially performs sampling of the collected data based on the clock with reference to the predetermined wavelength position where the reference signal detected is assigned ...

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    24. Reference signal filter for interferometric system

      Reference signal filter for interferometric system

      The invention provides a method and apparatus for applying spatial filtering the optical beam of a free space optical coherence tomography (OCT) system substantially without problematic reflections back to the optical source. The invention teaches spatially filtering the reference beam of the OCT system which is typically designed to provide isolation of the optical source from undesirable optical feed-back, thereby achieving spatial filtering without generating undesirable reflections back to the optical source. Various embodiments are taught.

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    1-24 of 2373 1 2 3 4 ... 97 98 99 »
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