1. Articles in category: Patents

    1-24 of 2790 1 2 3 4 ... 115 116 117 »
    1. 3D shadow reduction signal processing method for optical coherence tomography (OCT) images

      3D shadow reduction signal processing method for optical coherence tomography (OCT) images

      Shadows caused by opacities and obstructions (such as blood vessels) can block detection of structural information of objects below the shadow-causing structure, affecting visualization and analysis of those deeper structures. An image processing method for removing these shadows includes applying a low pass filter to an energy profile of an image to remove high frequency fluctuations in energy, thereby effectively recovering lower energy inside shadow regions and removing high frequency speckle. The image is then adjusted, for example by linear scaling, based on the filtered energy profile. Two dimensional filters may also be applied for volumes.

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    2. Optical coherence tomography apparatus and measurement method

      Optical coherence tomography apparatus and measurement method

      In an optical coherence tomography apparatus that generates a full-color optical coherence tomographic image, an image generation unit includes a correction processing unit that calculates an attenuation related value related to attenuation of signal intensity of the interference light of three R, G, and B colors in a first depth region and corrects the signal intensity of a second depth region deeper than the first depth region according to the attenuation related value to calculate a correction signal for the interference light and generates a full-color optical coherence tomographic image using the correction signals calculated for each of R, G ...

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    3. Method and device for contactless and non-destructive determination of the layer thicknesses of lacquer layers of vehicle parts

      Method and device for contactless and non-destructive determination of the layer thicknesses of lacquer layers of vehicle parts

      A method for contactless and non-destructive determination of the layer thicknesses of lacquer layers of vehicle parts is disclosed. In addition, the invention relates to a device to determine and measure the lacquer layers of vehicle part, the device constructed for performing optical coherence tomography and includes at least one radiation source for providing electromagnetic radiation and the electromagnetic radiation provides a wavelength (.lamda.)

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    4. Methods, devices, and support structures for assembling optical fibers in catheter tips

      Methods, devices, and support structures for assembling optical fibers in catheter tips

      Described herein are methods, devices, and support structures for assembling optical fibers in catheter tips and facilitating alignment and structural support. A method for assembling a plurality of optical fibers and lenses in a support structure for an ablation catheter includes providing a support structure with a proximal end, a body, and a distal end, wherein the distal end includes a plurality of alignment orifices or slits.

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      Mentions: MedLumics
    5. Automatic patient positioning within a laser eye surgery system

      Automatic patient positioning within a laser eye surgery system

      A laser eye surgery system produces a treatment beam that includes a plurality of laser pulses. An optical coherence tomography (OCT) subsystem produces a source beam used to locate one or more structures of an eye. The OCT subsystem is used to sense the distance between a camera objective on the underside of the laser eye surgery system and the patient's eye.

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      Mentions: Abbott Alcon
    6. Ophthalmological length measurement by means of dual-beam space-time domain wavelength tuning low-coherence interferometry

      Ophthalmological length measurement by means of dual-beam space-time domain wavelength tuning low-coherence interferometry

      Measurement of intraocular lengths by dual-beam Fourier low-coherence interferometry on the basis of Fresnel-zone-type space-time domain interferograms of the Purkinje-Sanson reflexes. The eye is illuminated by parallel, monochromatic dual beams having wavelengths which differ in temporal sequence. Wavelength spectra of space-time domain interferograms are imaged onto a photodetector array and registered.

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    7. Interferometry with pulse broadened diode laser

      Interferometry with pulse broadened diode laser

      Various optical systems equipped with diode laser light sources are discussed in the present application. One example system includes a diode laser light source for providing a beam of radiation. The diode laser has a spectral output bandwidth when driven under equilibrium conditions. The system further includes a driver circuit to apply a pulse of drive current to the diode laser. The pulse causes a variation in the output wavelength of the diode laser during the pulse such that the spectral output bandwidth is at least two times larger the spectral output bandwidth under the equilibrium conditions.

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    8. Imaging probe with rotatable core

      Imaging probe with rotatable core

      The present disclosure provides for an imaging probe with a rotatable core which allows for rotating imaging assembly that is larger in diameter than the lumen in which the rotatable core resides, as well as methods to construct said probes. The imaging probes are generally elongate flexible imaging catheters for use in cardiovascular procedures.

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    9. Swept frequency photonic integrated circuit for absolute metrology

      Swept frequency photonic integrated circuit for absolute metrology

      A digital measuring device implemented on a photonic integrated circuit, the digital measuring device including a tunable laser source implemented on the photonic integrated circuit configured to sweep over a frequency range to provide multi-wavelength light, a first waveguide structure implemented on the photonic integrated circuit configured to direct a first portion of light from the laser source at a moving object and receive light reflected from the moving object, a second waveguide structure implemented on the photonic integrated circuit configured to combine a second portion of light from the laser source with the light reflected from the moving object ...

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    10. Infrared otoscope for characterization of effusion

      Infrared otoscope for characterization of effusion

      An otoscope uses differential reflected response of optical energy at an absorption range and an adjacent wavelength range to determine the presence of water (where the wavelengths are water absorption wavelength and adjacent non-absorption excitation wavelengths). In another example of the invention, the otoscope utilizes OCT in combination with absorption and non-absorption range for bacteria and water.

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    11. Ophthalmic imaging apparatus, controlling method thereof, ophthalmic imaging method, and recording medium

      Ophthalmic imaging apparatus, controlling method thereof, ophthalmic imaging method, and recording medium

      An ophthalmic imaging apparatus of an exemplary aspect includes a data acquisition device, image constructing circuitry, and composing circuitry. The data acquisition device is configured to sequentially apply optical coherence tomography (OCT) scans to a plurality of regions different from each other of a fundus of a subject's eye in order and under a condition according to a fundus shape, to acquire a plurality of pieces of data corresponding to the plurality of regions. The image constructing circuitry is configured to construct an image from each of the plurality of pieces of data. The composing circuitry is configured to ...

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    12. Systems and methods to measure physiological flow in coronary arteries

      Systems and methods to measure physiological flow in coronary arteries

      In part, the disclosure relates to computer-based methods, and systems suitable for evaluating a subject to determine the appropriate diagnostic tools for assessing coronary arteries. This can include assessing various blood pressure values during a resting state (without inducing hyperemia). These systems and methods can assess a patient and identify coronary dominance on per patient basis. In turn, this assessment can be used to recommend whether a resting index is appropriate or if another index such as FFR or others such be obtained diagnostic metric such as a pressure value-based ratio.

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      Mentions: Abbott
    13. Systems and methods for airy beam optical coherence tomography

      Systems and methods for airy beam optical coherence tomography

      A system and method for performing Optical Coherence Tomography on a sample utilizes collimated, phase modulated beams of light in an interferometer. At least one of the beams of light utilized exists as an Airy beam for at least a portion of the procedure, obviating any deleterious impact caused by the Gaussian beam diffraction. The system may incorporate a light source, polarization beam splitter, delay line, non-polarization beam splitters, lenses, phase masks, waveplates, and mirrors, any or all of which may be controlled by a computing element.

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    14. Apparatus, device and method for capsule microscopy

      Apparatus, device and method for capsule microscopy

      An exemplary apparatus for obtaining data for at least one portion within at least one luminal or hollow sample can be provided. For example, the apparatus can include a first optical arrangement configured to transceive at least one electromagnetic radiation to and from the portion(s). The apparatus can also include a wavelength dispersive second arrangement, which can be configured to disperse the electromagnetic radiation(s). A housing can be provided with a shape of a pill, and enclosing the first and second arrangements.

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    15. Automated detection of shadow artifacts in optical coherence tomography angiography

      Automated detection of shadow artifacts in optical coherence tomography angiography

      Disclosed herein are methods and systems for automated detection of shadow artifacts in optical coherence tomography (OCT) and/or OCT angiography (OCTA). The shadow detection includes applying a machine-learning algorithm to the OCT dataset and the OCTA dataset to detect one or more shadow artifacts in the sample. The machine-learning algorithm is trained with first training data from first training samples that include manufactured shadows and no perfusion defects and second training data from second training samples that include perfusion defects and no manufactured shadows. The shadow artifacts in the OCTA dataset and/or OCT dataset may be suppressed to ...

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    16. OCT system and reference attachment

      OCT system and reference attachment

      An OCT system includes an OCT optical system and a reference attachment. The OCT optical system has a beam splitter for splitting light into a measurement optical path and a reference optical path, a photodetector, a first waveguide, a second waveguide, and first connectors provided at end portions of the first waveguide and the second waveguide respectively for indirectly or directly connecting the first waveguide and the second waveguide. The reference attachment has a third waveguide, and second connectors formed at both ends of the third wave guide and configured to be attachable to and detachable from the first connector ...

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    17. Compact OCT spectrometer suitable for mobile environment

      Compact OCT spectrometer suitable for mobile environment

      A compact handheld optical coherence tomography (OCT) spectrometer according to an embodiment of the present disclosure includes: a spectrometer optical module; a sensor board coupled to one side of the spectrometer optical module and including a sensor that converts light received from the spectrometer optical module into an electrical signal; and a connector configured to supply, to the sensor board, a control signal and a power signal received from another circuit outside the spectrometer and to transmit a signal received from the sensor board to another external circuit, and the sensor board is packaged with the spectrometer optical module, and ...

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      Mentions: Philophos
    18. OCT imaging catheter with lag correction

      OCT imaging catheter with lag correction

      A catheter system includes a catheter body, an imaging sensor, a drive motor, a current sensor, a display, and a controller. The catheter body includes a drive shaft. The imaging sensor is fixed relative to the distal end of the driveshaft and is configured to rotate therewith. The drive motor is configured to rotate the drive shaft. The current sensor is configured to measure an amount of current drawn by the drive motor as the drive shaft is rotated.

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      Mentions: Avinger
    19. Precisely controlled chirped diode laser and coherent lidar system

      Precisely controlled chirped diode laser and coherent lidar system

      Frequency modulated lasers, LIDAR systems, and methods of controlling laser are disclosed. A laser source emits an optical beam having an optical frequency that changes in response to a signal applied to an input of the laser source. A laser driver that generates the signal applied to the input to cause the optical frequency to vary in accordance with a periodic frequency versus time function.

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    20. Confidence-based method and system for analyzing images of a retina

      Confidence-based method and system for analyzing images of a retina

      Methods and systems of analyzing images of a retina captured by an Optical Coherence Tomography (OCT) scanner are disclosed. The methods and systems use a processor configured to implement a series of instructions that include creating a training set of images of a retina of a patient captured by an OCT scanner including labeled regions of diffuse intraretinal fluid (DIRF) such as by assessing maximum and minimum regions of DIRF and regions of pathology of the retina to generate a model, and analyzing the DIRF region or regions of pathology by the model to derive an assessment of the retina ...

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    21. Endoscopic OCT probes with immersed MEMS mirrors

      Endoscopic OCT probes with immersed MEMS mirrors

      Methods and apparatuses for enlarging the optical scan angle of imaging probes are provided. The optical scan angle of endoscopic probes can be increased by employing the "Snell's Window" effect. An endoscopic probe can include an endoscope shell, a device for capturing electromagnetic radiation, and a liquid or gel provided between the device for capturing electromagnetic radiation and the endoscope shell. The endoscope probe can further include a first mirror placed such that electromagnetic radiation entering through the endoscope shell can bounce off the first mirror and enter the device for capturing electromagnetic radiation. The first mirror can be ...

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    22. Optical coherence tomography (OCT) system for producing profilometry measurements of a specimen

      Optical coherence tomography (OCT) system for producing profilometry measurements of a specimen

      An optical coherence tomography (OCT) system for profilometry measurements of a specimen with a lateral resolution across the profilometry measurements is provided. The OCT system includes a line-field generator, an interferometer, and a spectrometer. The line-field generator includes a filter arranged in a focal plane of a lens for spatially filtering extended line-field light into a line-field light of a width equal to the lateral resolution. The interferometer is configured to interfere the line-field light reflected from the specimen illuminated with a line-shaped focus with a reference signal of the line-field light to produce an interference pattern. The spectrometer configured ...

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    23. Detecting avascular areas using neural networks

      Detecting avascular areas using neural networks

      An example method includes generating, using a multi-scale block of a convolutional neural network (CNN), a first output image based on an optical coherence tomography (OCT) reflectance image of a retina and an OCT angiography (OCTA) image of the retina. The method further includes generating, using an encoder of the CNN, at least one second output image based on the first output image and generating, using a decoder of the CNN, a third output image based on the at least one second output image.

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    1-24 of 2790 1 2 3 4 ... 115 116 117 »
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