1. Matthew J. Everett

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    1. Mentioned In 38 Articles

    2. Systems and methods for improved OCT measurements

      Systems and methods for improved OCT measurements
      Various systems and methods for sequential angle illumination to achieve ultra-high resolution optical coherence tomography (OCT) images. One example OCT system includes a light source, a beam divider, sample arm optics, a detector, and a processor. The light source generates a light beam to illuminate the sample. The beam divider separates the light beam into reference and sample arms. The sample arm optics sequentially illuminates a location in the sample ...
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    3. Efficient sampling of optical coherence tomography data for explicit ranging over extended depth

      Efficient sampling of optical coherence tomography data for explicit ranging over extended depth
      An efficient OCT data collection and processing method for obtaining a high-axial-resolution image with explicit ranging over an extended depth is described. The method includes collecting a first dataset at a transverse location of the sample. The first dataset comprises spectra of a bandwidth (.DELTA.k.sub.1) sampled at a spectral sampling interval (dk.sub.1). A second dataset comprising spectra of a bandwidth (.DELTA.k.sub.2) sampled ...
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    4. Automated analysis of the optic nerve head via optical coherence tomography measurements, methods and representations

      Automated analysis of the optic nerve head via optical coherence tomography measurements, methods and representations
      The present invention relates to structural analysis of the optic nerve head (ONH). In one approach, a 3D volume of intensity data which includes the optic nerve head is acquired using an optical coherence tomography (OCT) system. The vitreoretinal interface (VRI) and the optic disc margin are identified from the 3D data. The minimum area of a surface from the optic disc margin to the VRI is determined. This minimum ...
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    5. Swept source interferometric imaging systems and methods

      Swept source interferometric imaging systems and methods
      Embodiments herein include swept-source interferometric imaging systems employing arbitrary sweep patterns in which a swept-source is swept over a continuous spectral range where the variation of wavelength over time is noncontinuous. Embodiments include sweep patterns that result in reduction of signals from moving scatterers and where the sweep is synchronized with the dead time of the camera.
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    6. Efficient interferometer designs for optical coherence tomography

      Efficient interferometer designs for optical coherence tomography
      Efficient interferometer designs for optical coherence tomography (OCT) systems are presented. One example interferometer design includes two polarization dependent beamsplitters and a non-polarization dependent combiner. The first polarization dependent beamsplitter transmits light in a first polarization state to a sample arm of the OCT system and transmits light in a second polarization state different from the first polarization state to a reference arm of the system. The second polarization dependent ...
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    7. Line-field holoscopy

      Line-field holoscopy
      A novel imaging method, line-field holoscopy is presented. A line of light is projected across an object to be investigated through an imaging system. The light scattered from the investigated object is combined with reference radiation. The combined light is projected onto a detector providing a confocal restriction in one dimension. Astigmatic optics in the return path transform the light asymmetrically such that at the detector, the line focus is ...
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    8. Split integration mode acquisition for optimized OCT imaging at multiple speeds

      Split integration mode acquisition for optimized OCT imaging at multiple speeds
      Split Integration Mode (SIM) acquisition schemes are presented that enable optical coherence tomography (OCT) imaging at multiple rates. SIM enables a system and method of operation having a first mode and a second mode, wherein the fundamental acquisition rate of the detector is the same in the two modes, but wherein the generated signals in the second mode are digitally combined prior to signal processing to create a data set ...
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    9. Automated analysis of the optic nerve head: measurements, methods and representations

      Automated analysis of the optic nerve head: measurements, methods and representations
      The present invention relates to structural analysis of the optic nerve head (ONH). In one approach, a 3D volume of intensity data which includes the optic nerve head is acquired using an optical coherence tomography (OCT) system. The vitreoretinal interface (VRI) and the optic disc margin are identified from the 3D data. The minimum area of a surface from the optic disc margin to the VRI is determined. This minimum ...
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    10. Systems and methods for efficiently obtaining measurements of the human eye using tracking

      Systems and methods for efficiently obtaining measurements of the human eye using tracking
      Systems and methods for efficiently obtaining optical coherence tomography (OCT) measurement data with reduced effects of motion are presented. One embodiment involves determining the amount of motion present during the collection of an OCT data set based on images of the eye collected at the same time as the OCT data, and recollecting select portions of the OCT data set when the amount of eye motion is determined to exceed ...
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    11. Method Of Motion Correction In Optical Coherence Tomography Imaging

      Method Of Motion Correction In Optical Coherence Tomography Imaging
      An image data set acquired by an optical coherence tomography (OCT) system is corrected for effects due to motion of the sample. A first set of A-scans is acquired within a time short enough to avoid any significant motion of the sample. A second more extensive set of A-scans is acquired over an overlapping region on the sample. Significant sample motion may occur during acquisition of the second set. A-scans ...
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    12. Methods to reduce variance in OCT analysis of the macula

      Methods to reduce variance in OCT analysis of the macula
      Methods for analyzing optical coherence tomography (OCT) images of the macula to reduce variance and improve disease diagnosis are presented. One embodiment of the invention is directed towards selecting analysis locations and data segmentation techniques to take advantage of structural homogeneities. Another embodiment is directed towards reducing the variance in a collection of normative data by transforming the individual members of the database to correspond to a Standard Macula. Variations ...
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    13. Variable resolution optical coherence tomography scanner and method for using same

      Variable resolution optical coherence tomography scanner and method for using same
      The invention relates generally to optical tomographic imaging and in particular to systems and methods for adapting the resolution of imaging. One embodiment of the present invention is an apparatus for optical coherence tomography imaging, characterized by its ability to vary the axial resolution and scanning speed during imaging.
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    14. Data Acquisition Methods For Reduced Motion Artifacts And Applications In Oct Angiography

      Data Acquisition Methods For Reduced Motion Artifacts And Applications In Oct Angiography
      Systems and methods for reducing the effects of motion on functional optical coherence tomography (OCT) imaging are described. Embodiments including post-processing and motion tracking are presented. A preferred embodiment in which functional OCT data is collected and analyzed for motion as a multiple scan unit is described. An extension of the invention to the collection of large field of view or montaged functional OCT data sets is also presented.
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    15. Inter-frame complex OCT data analysis techniques

      Inter-frame complex OCT data analysis techniques
      Techniques for collecting and processing complex OCT data to detect localized motion contrast information with enhanced accuracy and sensitivity are presented. In a preferred embodiment, vector differences between complex OCT signals taken at the same location on the sample are used to detect blood flow in the retina. Additional embodiments involving non-linear intensity weighting of the motion contrast information, normalization of the vector difference amplitudes, and calculating the absolute value ...
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    16. Systems And Methods For SWEPT-SOURCE Optical Coherence Tomography

      Systems And Methods For SWEPT-SOURCE Optical Coherence Tomography
      Systems and methods for increasing the duty cycle and/or producing interleaved pulses of alternating polarization states in swept-source optical coherence tomography (OCT) systems are considered. Embodiments including improved buffering, frequency selecting filter sharing among multiple SOAs, intracavity switching, and multiple wavelength bands are described. The unique polarization properties of the source configurations have advantages in speckle reduction, polarization-sensitive measurements, polarization state dependent phase shifts, spatial shifts, and temporal shifts ...
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    17. 1-15 of 38 1 2 3 »
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  2. About Matthew J. Everett

    Matthew J. Everett is an engineer at Zeiss Meditec working on OCT products.