1. Joseph M. Schmitt

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    1. Mentioned In 71 Articles

    2. Coherence gated doppler motion sensor and medical applications

      Coherence gated doppler motion sensor and medical applications
      A motion sensor applicable to medical procedures includes a source of light with a wavelength bandwidth and an optical detector. A first optical coupler terminates in a first probe tip and couples the light into the first probe tip. A second optical coupler terminates in a second probe tip and directs onto the detector scattered light returning through the second probe tip. A presentation device outputs a signal that indicates ...
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    3. Optical buffering methods, apparatus, and systems for increasing the repetition rate of tunable light sources

      Optical buffering methods, apparatus, and systems for increasing the repetition rate of tunable light sources
      In one embodiment, the invention relates to an apparatus for increasing the repetition rate in a light source. The apparatus includes a first optical coupler comprising a first arm, a second arm and a third arm; a first mirror in optical communication with the second arm of the first optical coupler; and a first optical delay line having a first end in optical communication with the third arm of the ...
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    4. Lumen morphology image reconstruction based on the scan line data of OCT

      Lumen morphology image reconstruction based on the scan line data of OCT
      A method and apparatus of automatically locating in an image of a blood vessel the lumen boundary at a position in the vessel and from that measuring the diameter of the vessel. From the diameter of the vessel and estimated blood flow rate, a number of clinically significant physiological parameters are then determined and various user displays of interest generated. One use of these images and parameters is to aid ...
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    5. Methods and apparatus for swept-source optical coherence tomography

      Methods and apparatus for swept-source optical coherence tomography
      A method and apparatus for tunable filter linearization of a Fourier-Domain Mode Locking (FDML) laser for a SS-OCT comprising the steps of: choosing a fundamental frequency that avoids the mechanical resonance frequencies of a tunable filter; summing two or three harmonically related sinusoids of the fundamental frequency; and tuning the amplitudes and phases of the summed sinusoids to compensate for nonuniformities in amplitude and phase responses of the tunable filter.
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    6. Intravascular Optical Coherence Tomography System with Pressure Monitoring Interface and Accessories

      Intravascular Optical Coherence Tomography System with Pressure Monitoring Interface and Accessories
      An optical coherence tomography system and method with integrated pressure measurement. In one embodiment the system includes an interferometer including: a wavelength swept laser; a source arm in communication with the wavelength swept laser; a reference arm in communication with a reference reflector; a first photodetector having a signal output; a detector arm in communication with the first photodetector, a probe interface; a sample arm in communication with a first ...
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    7. Method of determining pressure in a vessel as measured by an optical pressure transducer in an optical coherence tomography system

      Method of determining pressure in a vessel as measured by an optical pressure transducer in an optical coherence tomography system
      An OCT system and method with integrated pressure measurement. In one embodiment, the system includes an interferometer; a wavelength swept laser; a source arm in communication with the wavelength swept laser; a reference arm in communication with a reference reflector; a first photoreceiver having a signal output; a detector arm in communication with the first photoreceiver, a probe interface; a sample arm in communication with a first optical connector of ...
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    8. Miniature optical elements for fiber-optic beam shaping

      Miniature optical elements for fiber-optic beam shaping
      In part, the invention relates to optical caps having at least one lensed surface configured to redirect and focus light outside of the cap. The cap is placed over an optical fiber. Optical radiation travels through the fiber and interacts with the optical surface or optical surfaces of the cap, resulting in a beam that is either focused at a distance outside of the cap or substantially collimated. The optical ...
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    9. Phase-lock loop-based clocking system, methods and apparatus

      Phase-lock loop-based clocking system, methods and apparatus
      In part, the invention relates to an optical coherence tomography system that includes one or more phased-locked loop circuits. In one embodiment, the phased-locked loop circuit includes a phase detector, a loop filter, and a voltage controlled oscillator wherein the phased-locked loop circuit is configured to generate a sample clock. The optical coherence tomography system can include an analog to digital converter having a sample clock input, an interferometric signal ...
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    10. Swept mode-hopping laser system, methods, and devices for frequency-domain optical coherence tomography

      Swept mode-hopping laser system, methods, and devices for frequency-domain optical coherence tomography
      In part, the invention relates to frequency-domain optical coherence tomography system. The system includes a tunable laser comprising a laser output for transmitting laser light and a laser cavity having a length L, a gain element disposed within the laser cavity; a tunable wavelength selective element disposed within the laser cavity; a reference reflector disposed outside of the laser cavity; an interferometer in optical communication with the laser output and ...
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    11. Intravascular optical coherence tomography system with pressure monitoring interface and accessories

      Intravascular optical coherence tomography system with pressure monitoring interface and accessories
      An optical coherence tomography system and method with integrated pressure measurement. In one embodiment the system includes an interferometer including: a wavelength swept laser; a source arm in communication with the wavelength swept laser; a reference arm in communication with a reference reflector; a first photodetector having a signal output; a detector arm in communication with the first photodetector, a probe interface; a sample arm in communication with a first ...
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    12. Volumetric assessment of lesion severity with optical coherence tomography: relationship with fractional flow reserve

      Volumetric assessment of lesion severity with optical coherence tomography: relationship with fractional flow reserve
      Aims: Frequency-domain optical coherence tomography (FD-OCT) provides a rapid tomographic scan of a coronary vessel, with an accurate reconstruction of its lumen profile. An FD-OCT-based metric that corresponds more closely with physiological significance of lesions may enable more precise guidance of interventional procedures. The aim of this feasibility study was to evaluate a new method for quantifying coronary lesion severity that estimates hyperaemic flow resistance of branched vessel segments imaged ...
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    13. Systems, Methods And Apparatus For Determining A Fractional Flow Reserve

      Systems, Methods And Apparatus For Determining A Fractional Flow Reserve
      In one aspect, the invention relates to system comprising: a processor configured to receive a first optical coherence tomography (OCT) data set obtained during a pullback of a data collection probe along a first length of a first blood vessel; determine a minimum lumen area disposed along the first length using the first OCT data set; and determine a first FFR value along the first length based on the minimum ...
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    14. Optical Coherence Tomography And Pressure Based Systems And Methods

      Optical Coherence Tomography And Pressure Based Systems And Methods
      In part, the invention relates to methods, apparatus, and systems suitable for determining a fractional flow reserve (FFR) and variations of modifications thereof One embodiment relates to a method and apparatus for obtaining a corrected FFR in a vessel having a stenosis. In one aspect, the invention relates to an apparatus for measuring corrected FFR of a vessel having a stenosis. In one embodiment, the apparatus includes a probe comprising ...
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    15. Extended coherence length megahertz FDML and its application for anterior segment imaging

      Extended coherence length megahertz FDML and its application for anterior segment imaging
      We present a 1300 nm Fourier domain mode locked (FDML) laser for optical coherence tomography (OCT) that combines both, a high 1.6 MHz wavelength sweep rate and an ultra-long instantaneous coherence length for rapid volumetric deep field imaging. By reducing the dispersion in the fiber delay line of the FDML laser, the instantaneous coherence length and hence the available imaging range is approximately quadrupled compared to previously published MHz-FDML ...
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    16. 1-15 of 71 1 2 3 4 5 »
  1. Categories

    1. Applications:

      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
    2. Business News:

      Acquisition, Clinical Trials, Funding, Other Business News, Partnership, Patents
    3. Technology:

      Broadband Sources, Probes, Tunable Sources
    4. Miscellaneous:

      Jobs & Studentships, Student Theses, Textbooks
  2. About Joseph M. Schmitt

    Joseph M. Schmitt, Ph.D. Chief Technology Officer at Lightlab Imaging.

  3. Quotes

    1. It is an honor to be recognized by SPIE with this Prism Award. This shows how the many years of hard work put in by the people here at LightLab in developing the C7 XR™ system is being recognized by their peers.
      In LightLab Imaging Receives Prism Award
    2. For cancers of the colon or lung, the standard now is to look at the organ with a lighted scope, then take a sample of tissue.
      In Emerging Alternatives May Lead to End of Biopsies