1. Articles in category: Probes

    1-24 of 563 1 2 3 4 ... 22 23 24 »
    1. Method and system for characterising biological tissue

      Method and system for characterising biological tissue

      The present disclosure provides a method for characterizing a region of interest within or between biological tissue. The method comprises inserting at least a portion of a probe into the region of interest and directing electromagnetic radiation to the region of interest and receiving electromagnetic radiation from the region of interest using the probe in a direction that is transversal to a length of the probe. Further, the method comprises directing a fluid to the region of interest through a portion of the probe and analyzing received electromagnetic radiation.

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    2. Optical probes with reflecting components for astigmatism correction

      Optical probes with reflecting components for astigmatism correction

      Some devices comprise a first light-guiding component, a second light-guiding component, a lens, an optical-correction component that has a reflecting surface that faces the lens, and a sheath, which causes astigmatism. The reflecting surface has an optical power on a first axis of two orthogonal axes, the optical power on the first axis compensates for the astigmatism, and the reflecting surface has a negligible optical power on a second axis of the two orthogonal axes. Also, the reflecting surface is configured to reflect light from the lens and redirect the reflected light through the sheath.

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    3. Frustrated total internal reflection fingerprint detector

      Frustrated total internal reflection fingerprint detector

      The device provides an optical coherence tomography system; a first bank of light emitting diodes emitting light centered about a first wavelength; a second bank of light emitting diodes, emitting light centered about a second wavelength; a prism, said prism including a first surface transmissive of the wavelength of the probe beam of the optical coherence tomography system, and a second surface which is also transmissive of the wavelength of the probe beam, and where the second is surface coated from a first edge to a midpoint so to be reflective of light at the first wavelength and transmissive of ...

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    4. Finger-mounted quantitative micro-elastography

      Finger-mounted quantitative micro-elastography

      We present a finger-mounted quantitative micro-elastography (QME) probe, capable of measuring the elasticity of biological tissue in a format that avails of the dexterity of the human finger. Finger-mounted QME represents the first demonstration of a wearable elastography probe. The approach realizes optical coherence tomography-based elastography by focusing the optical beam into the sample via a single-mode fiber that is fused to a length of graded-index fiber. The fiber is rigidly affixed to a 3D-printed thimble that is mounted on the finger. Analogous to manual palpation, the probe compresses the tissue through the force exerted by the finger. The resulting ...

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    5. Optical probe at surgeon's fingertips for breast cancer removal

      Optical probe at surgeon's fingertips for breast cancer removal

      A finger-mounted probe is under development at the University of Western Australia to improve the surgical removal of breast cancer. This approach could be of value in scenarios where the use of a relatively bulky handheld probe is not convenient, such as when assessing if residual tumor is present in small cavities following excision of the main tumor mass in breast-conserving surgery. The device might also prove useful for brain and liver surgery and other types of cancer. A fiber probe incorporated into a wearable thimble uses quantitative micro-elastography (QME) to translate the The finger-mounted probe is placed perpendicular to ...

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    6. OCT-IVUS catheter for concurrent luminal imaging

      OCT-IVUS catheter for concurrent luminal imaging

      The invention relates to an apparatus for in vivo imaging. More specifically, the present invention relates to a catheter that incorporates an Optical Coherence Tomography (OCT) system and an Intravascular Ultrasound ("IVUS) system for concurrent imaging of luminal systems, such as imaging the vasculature system, including, without limitation, cardiac vasculature, peripheral vasculature and neural vasculature.

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    7. Probe

      Probe

      A configuration is provided for firmly fixing a transmitting and receiving unit for IVUS and a transmitting and receiving unit for OCT in a probe of an imaging apparatus for diagnosis in which space saving is achieved. The probe includes a cylindrical housing in which an ultrasonic wave transmitting and receiving unit is arranged on a distal side and a light transmitting and receiving unit is arranged on a proximal side. Two signal wires are connected to the ultrasonic wave transmitting and receiving unit and which extend toward the proximal side substantially parallel to each other and which are arranged ...

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    8. Optical coherence tomography probe for crossing coronary occlusions

      Optical coherence tomography probe for crossing coronary occlusions

      Systems and methods for controlling a guide with the aid of optical coherence tomography (OCT) data are described. A guide wire includes at least one optical fiber, a flexible substrate, and one or more optical elements. The at least one optical fiber transmits a source beam of radiation. The flexible substrate includes a plurality of waveguides. At least one of the plurality of waveguides transmits one or more beams of radiation away from the guide wire, and at least one of the plurality of waveguides receives one or more beams of scattered radiation that have been reflected or scattered from ...

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    9. Scanning optical coherence tomography probe for in vivo imaging and displacement measurements in the cochlea

      Scanning optical coherence tomography probe for in vivo imaging and displacement measurements in the cochlea

      We developed a spectral domain optical coherence tomography (SDOCT) fiber optic probe for imaging and sub-nanometer displacement measurements inside the mammalian cochlea. The probe, 140 μm in diameter, can scan laterally up to 400 μm by means of a piezoelectric bender. Two different sampling rates are used, 10 kHz for high-resolution B-scan imaging, and 100 kHz for displacement measurements in order to span the auditory frequency range of gerbil (~50 kHz). Once the cochlear structures are recognized, the scanning range is gradually decreased and ultimately stopped with the probe pointing at the selected angle to measure the simultaneous displacements of ...

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    10. Mirrorcle Technologies to present and exhibit at Photonics West 2019

      Mirrorcle Technologies to present and exhibit at Photonics West 2019

      Mirrorcle Technologies is excited to announce the presentation of its latest developments in automotive laser projection systems at this year’s SPIE Photonics West exhibition in San Francisco. The company’s CEO, Dr. Veljko Milanović, and Sr. Electronics Engineer, Mr. Abhishek Kasturi, will provide an overview of some of the company’s most recent R&D achievements at the MOEMS and Miniaturized Systems XVIII conference (Session 5, Paper 10931-21) titled MEMS Mirror Module for Programmable Light System . On Sunday morning, February 3 rd , 2019 at 08:40 AM, conference attendees will get an overview of the company’s programmable light ...

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    11. Integrated ultrasound, OCT, PA and/or florescence imaging endoscope for diagnosing cancers in gastrointestinal, respiratory, and urogenital tracts

      Integrated ultrasound, OCT, PA and/or florescence imaging endoscope for diagnosing cancers in gastrointestinal, respiratory, and urogenital tracts

      A multimodality imaging system including ultrasound, optical coherence tomography (OCT), photoacoustic (PA) imaging, florescence imaging and endoscopic catheter for imaging inside the gastrointestinal tract with real-time automatic image co-registration capability, including: an ultrasound subsystem for imaging; an optical coherence tomography (OCT) subsystem for imaging, a PA microscopy or tomography subsystem for imaging and a florescence imaging subsystem for imaging. An invasive interventional imaging device is included with an instrumentality to take a tissue biopsy from a location visible on the ultrasound subsystem for imaging, on the optical coherence tomography (OCT) subsystem for imaging, photoacoustic (PA) subsystem for imaging and florescence ...

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    12. Imaging probes and associated devices, systems, and methods utilizing an elastomeric optical element

      Imaging probes and associated devices, systems, and methods utilizing an elastomeric optical element

      The imaging probe can comprise a housing, having a proximal region configured to be coupled to an optical cable; a cannula, extending from a distal region of the housing; an optical guide, positioned partially in the housing and partially in the cannula, configured to receive an imaging light from the cable in the proximal region of the housing, and to guide the imaging light towards a distal end of the cannula; an optical focusing element, configured to receive the imaging light from the optical guide, and to emit a focused imaging light; an elastomeric optical element, configured to receive the ...

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    13. Reflective optical coherence tomography probe

      Reflective optical coherence tomography probe

      A beam-shaping optical system suitable for use with optical coherence tomography includes a beam-shaping body having a beam-shaping element and an alignment feature. An optical fiber is coupled to the alignment feature. The fiber has a fiber end configured to emit an electromagnetic beam. The fiber and the body are configured to direct the beam into the beam-shaping element such that the beam is shaped solely by reflection into an image spot.

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      Mentions: Corning
    14. Endoscopic optical coherence tomography with wide field-of-view for the morphological and functional assessment of the human tympanic membrane

      Endoscopic optical coherence tomography with wide field-of-view for the morphological and functional assessment of the human tympanic membrane

      An endoscopic optical coherence tomography (OCT) system with a wide field-of-view of 8 mm is presented, which combines the image capability of endoscopic imaging at the middle ear with the advantages of functional OCT imaging, allowing a morphological and functional assessment of the human tympanic membrane. The endoscopic tube has a diameter of 3.5 mm and contains gradient-index optics for simultaneous forward-viewing OCT and video endoscopy. The endoscope allows the three-dimensional visualization of nearly the entire tympanic membrane. In addition, the oscillation of the tympanic membrane is measured spatially resolved and in the frequency range between 500 Hz and ...

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    15. 70  μm diameter optical probe for common-path optical coherence tomography in air and liquids

      70  μm diameter optical probe for common-path optical coherence tomography in air and liquids

      We investigate and validate a novel method to fabricate ultrathin optical probes for common-path optical coherence tomography (CP-OCT). The probes are obtained using a 65 μm barium titanate microsphere inserted into an inward concave cone chemically etched at the end of a single-mode fiber. We demonstrate that the high refractive index (

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    16. Faster 3-D imaging could aid diagnosis of cardiovascular, gastrointestinal disease

      Faster 3-D imaging could aid diagnosis of cardiovascular, gastrointestinal disease

      Researchers have developed a faster way to acquire 3-D endoscopic optical coherence tomography (OCT) images. With further development, the new approach could be useful for early detection and classification of a wide range of diseases. The new method uses computational approaches that create a full 3-D image from incomplete data. In the Optical Society journal Applied Optics , the researchers report that useful 3-D images could be constructed using 40 percent less data than traditional 3-D OCT approaches, which would decrease imaging time by 40 percent. OCT is a biomedical imaging technique that has seen expanding clinical use in recent years ...

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    17. Three-dimensional endoscopic OCT using sparse sampling with a miniature magnetic-driven scanning probe

      Three-dimensional endoscopic OCT using sparse sampling with a miniature magnetic-driven scanning probe

      We propose to apply sparse sampling and compressive sensing (CS) reconstruction in three-dimensional (3D) endoscopic optical coherence tomography (OCT) to reduce the amount of data required in the imaging process. We used a homemade miniature side-imaging magnetic-driven scanning probe with an outer diameter of 1.4 mm in a 1310 nm swept-source OCT system to acquire two-dimensional (2D) circumferential cross-sectional images of an ex vivo pigeon trachea sample. 3D imaging is then achieved by reconstruction from the multiple 2D images acquired while pulling the sample with a translation stage. Given a total translation distance, we achieved sparse sampling by randomizing ...

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    18. Mirrorcle laser-cuts ribbon on cleanroom facility for volume MEMS mirror

      Mirrorcle laser-cuts ribbon on cleanroom facility for volume MEMS mirror

      In a ribbon cutting ceremony Mirrorcle Technologies inaugurated its new cleanroom space at the company’s Richmond, CA headquarters. Reflecting the company’s core competency of reliable optical beam-steering, the ribbon was cut by one of company’s latest products – a laser beam Scan Module which features a powerful 1W, blue (450nm) laser that was developed for the emerging dynamic solid-state lighting (phosphor lighting) market. As the company’s founder and CEO, Dr. Veljko Milanovic, dragged his finger on a tablet controlling the battery-powered Scan Module via Bluetooth, the laser beam, which was steered by the company’s 1.2mm ...

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    19. An ultraslim all-fiber microendoscope for depth-resolved imaging

      An ultraslim all-fiber microendoscope for depth-resolved imaging

      We demonstrate an ultraslim all-fiber microendoscope for depth-resolved imaging that integrates a gradient-index (GRIN) fiber and an imaging fiber bundle. The desired imaging depth is achieved through a high-precision adjustment of the length of the GRIN fiber. A fusion splicing of this fiber to an imaging fiber bundle, with provisions for a carefully tailored adiabatic conical transition region, keeps these fiber components robustly aligned, enabling a high-quality image transmission with no compromise on fiber-probe flexibility. With the maximum outer diameter of this microendoscope scalable down to ≈50  μ m, the range of envisaged applications spans from depth-resolved brain imaging, deep optical ...

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    20. Integrated optical coherence tomography and multielement ultrasound transducer probe for shear wave elasticity imaging of moving tissues

      Integrated optical coherence tomography and multielement ultrasound transducer probe for shear wave elasticity imaging of moving tissues

      Accurate measurements of microelastic properties of soft tissues in-vivo using optical coherence elastography can be affected by motion artifacts caused by cardiac and respiratory cycles. This problem can be overcome using a multielement ultrasound transducer probe where each ultrasound transducer is capable of generating acoustic radiation force (ARF) and, therefore, creating shear waves in tissue. These shear waves, produced during the phase of cardiac and respiratory cycles when tissues are effectively stationary, are detected at the same observation point using phase-sensitive optical coherence tomography (psOCT). Given the known distance between the ultrasound transducers, the speed of shear wave propagation can ...

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    21. Advanced imaging technology for arteries and veins developed by UK engineers

      Advanced imaging technology for arteries and veins developed by UK engineers

      Engineers at Cambridge Consultants have developed a 1.35mm diameter, 0.16 megapixels prototype HD camera called Leap, a cheap, single-use endoscope that can be operated from a standard computer. Leap can give an accurate image of the inside of arteries and veins, and is flexible and sufficiently small enough to use during an intracoronary angioscopy for example. Leap allows surgeons to undertake tissue classification or direct imaging of non-standard vascular occlusions, and could be used in conjunction with intravascular ultrasounds and optical coherence tomography for superior diagnostic techniques during surgery. Simon Karger, head of Surgical and Interventional Products at ...

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    22. Forward and side imaging optical coherence tomography probe

      Forward and side imaging optical coherence tomography probe

      A forward-imaging optical coherence tomography probe is provided, comprising: a substantially cylindrical housing comprising: a longitudinal axis; an interior side; a distal end that is optically transparent; and a mirror located at the interior side, adjacent the distal end; an optical fiber located inside the cylindrical housing along the longitudinal axis; a wedge lens located inside the cylindrical housing, adjacent the distal end, the wedge lens configured to receive light from the fiber, and direct the light towards the mirror; and, at least one motor configured to both: rotate the fiber and the wedge lens about the longitudinal axis and ...

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    23. Radiofrequency ablation catheter with optical tissue evaluation

      Radiofrequency ablation catheter with optical tissue evaluation

      Systems and methods for performing RF ablation while monitoring the procedure using low coherence interferometry (LCI) data are described. A catheter includes a distal section, a proximal section, a multiplexer, and a sheath coupled between the distal section and the proximal section. The distal section includes several interconnected optical ports configured to transmit exposure radiation toward a sample and receive radiation that have been reflected or scattered from the sample. The interconnected optical ports are formed on a substrate having rigid sections and flexible sections arranged around the distal section. A holder maintains the interconnected optical elements in a fixed ...

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    24. Optic axis mapping with catheter-based polarization-sensitive optical coherence tomography

      Optic axis mapping with catheter-based polarization-sensitive optical coherence tomography

      Birefringence offers an intrinsic contrast mechanism related to the microstructure and arrangement of fibrillary tissue components. Here we present a reconstruction strategy to recover not only the scalar amount of birefringence, but also its optic axis orientation as a function of depth in tissue from measurements with catheter-based polarization-sensitive optical coherence tomography. A polarization symmetry constraint, intrinsic to imaging in the backscatter direction, facilitates the required compensation for wavelength-dependent transmission through the system elements, the rotating catheter, and overlying tissue layers. Applied to the intravascular imaging of coronary atherosclerosis in human patients, the optic axis affords refined interpretation of plaque ...

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    1-24 of 563 1 2 3 4 ... 22 23 24 »
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  2. Popular Articles

  3. Organizations in the News

    1. (3 articles) University of Western Australia
    2. (1 articles) University of Texas at Austin
    3. (1 articles) University of St. Andrews
  4. People in the News

    1. (2 articles) Brendan F. Kennedy
    2. (1 articles) Thomas E. Milner
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  5. OCT Companies in the News

    1. (1 articles) Terumo Corporation
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