1. Articles in category: Probes

    241-264 of 376 « 1 2 ... 8 9 10 11 12 13 14 15 16 »
    1. Multi-Function Optical Probe System For Medical And Veterinary Applications (Wo 2010/104752)

      Multi-Function Optical Probe System For Medical And Veterinary Applications (Wo 2010/104752)
      A device includes a handpiece having a probe tip disposed at an end thereof, and, connected to the handpiece such that, at the probe tip, a functionality of each is provided, a plurality of probes. The probes may include an optical coherence tomography (OCT) probe, an endoillumination probe, a laser therapy probe, an ultrasound imaging probe, an electrocautery probe, an RF ablation probe, a cryosurgical probe, an irrigator, and/or a mechanical probe.
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    2. Surgical microscope having an OCT-system

      Surgical microscope having an OCT-system
      A surgical microscope (100) has viewing beams (109a, 109b) passing through a microscope imaging optic which includes a microscope main objective system (101) having a magnification system of variable magnification. The microscope imaging optic transposes a convergent viewing beam (109a, 109b) from the object region (114) into a parallel beam. The surgical microscope includes an OCT-system (120) for examining the object region (114). The OCT-system (120) makes available an OCT-scanning beam (190) which is guided through the microscope imaging optic.
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    3. Method and apparatus for measurement of optical properties in tissue

      Method and apparatus for measurement of optical properties in tissue
      A method of analyzing tissue includes inserting a radiation source into tissue, impinging radiation upon the tissue, obtaining a sample signal of the radiation that impinges upon the tissue, and determining a refractive index of the tissue from the sample signal. The method may also include determining at least one other optical property of the tissue. The method may provide for identifying tissue as part of a biopsy method. A device for analyzing tissue may include a low-coherence interferometer and a probe optically coupled to the interferometer, where the probe includes a radiation source.
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    4. Robust High-Resolution Fine OCT Needle for Side-Viewing Interstitial Tissue Imaging

      Robust High-Resolution Fine OCT Needle for Side-Viewing Interstitial Tissue Imaging
      Fine optical coherence tomography (OCT) imaging needles that can be integrated with a standard biopsy needle have been developed with a new optics design to improve the optical quality and mechanical robustness, where a fiber-optic lens (that is spliced to a single-mode fiber) and a microreflector are encased within a microglass tube. The design also minimizes the cylindrical lens effect induced by the glass tube and eases the needle assembly process. Real-time cross-sectional OCT imaging of various tissue samples were performed ex vivo using the miniature-imaging needle along with a 1300-nm swept-source OCT system. The preliminary results demonstrate the improved ...
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    5. Endoscopic Functional Fourier Domain Common-Path Optical Coherence Tomography for Microsurgery

      Endoscopic Functional Fourier Domain Common-Path Optical Coherence Tomography for Microsurgery
      A single-arm interferometer-based optical coherence tomography (OCT) system known as common-path OCT (CP-OCT) is rapidly progressing towards practical application. Due in part to the simplicity and robustness of its design, Fourier domain CP-OCT (FD-CP-OCT) offers advantages in many endoscopic sensing and imaging applications. FD-CP-OCT uses simple, interchangeable fiber optic probes that are easily integrated into small and delicate surgical tools. The system is capable of providing not only high-resolution imaging but also optical sensing. Here, we report progress towards practical application of FD-CP-OCT in the setting of delicate microsurgical procedures such as intraocular retinal surgery. To meet the challenges presented ...
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    6. In-vivo dynamic characterization of microneedle skin penetration using optical coherence tomography

      In-vivo dynamic characterization of microneedle skin penetration using optical coherence tomography
      The use of microneedles as a method of circumventing the barrier properties of the stratum corneum is receiving much attention. Although skin disruption technologies and subsequent transdermal diffusion rates are being extensively studied, no accurate data on depth and closure kinetics of microneedle-induced skin pores are available, primarily due to the cumbersome techniques currently required for skin analysis. We report on the first use of optical coherence tomography technology to image microneedle penetration in real time and in vivo. We show that optical coherence tomography (OCT) can be used to painlessly measure stratum corneum and epidermis thickness, as well as ...
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    7. Multimodal Depth-Resolving Endoscope

      Multimodal Depth-Resolving Endoscope
      A fiber-optic multimodal multi-spectral (MS), Optical Coherence Tomography (OCT), photoacoustic (PA) endoscope with beam scanning by a two-dimensional Microelectromechanical systems (MEMS) scanner present in the endoscopic head, combined in a synergetic way in a single endoscopic system. The PA, OCT and MS light sources are coupled to the endoscopic head through an optical switcher. Using a single optical endoscopic head and an electro-optical switch the endoscope of the invention is capable of sequential or parallel MS, OCT and PA imaging. The endoscope provides real-time imaging with a rate of 5 to 60 frames per second for each of the three ...
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    8. Miniature Non-MEMS Scanner For Small Size Imaging Systems

      Miniature Non-MEMS Scanner For Small Size Imaging Systems
      The SMALLEST available non-MEMS Resonant Scanner currently on the market was developed by Electro-Optical Products Corp. is a miniature electromagnetically driven moving mirror device (0.9 x 0.5 x 0.4 inches), which deflects a light beam with a continuous sinusoidal motion. EOPC's technology offers 6 mm diameter, 7x7 mm and 12x7 mm size mirrors, with an optical scanning angle up to 50°, and a fixed-frequency scanning range from 100 to 1000 Hz, fixed at any one value within the range. AGC type driver provides: •both sine wave and TTL level square wave reference signals •trimpot control to ...
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    9. System and method for identifying tissue using low-coherence interferometry

      System and method for identifying tissue using low-coherence interferometry
      An apparatus for needle biopsy with real time tissue differentiation using one dimensional interferometric ranging imaging, comprising a biopsy device having a barrel and a needle, an optical fiber inserted in the needle, and a fiber optic imaging system connected to the optical fiber. The imaging system obtains images and compares the optical properties and patterns to a database of normalized tissue sample images to determine different tissue types. The physician performing the biopsy obtains feedback via a feedback unit associated with the biopsy device and which is connected to the imaging system. The feedback unit can provide visual, audible ...
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    10. Interference objective for annular test surfaces

      Interference objective for annular test surfaces
      An apparatus including: an interferometric objective comprising a beam splitter surface configured to separate input light into test light and reference light, and a reference surface configured to receive the reference light and direct it back to the beam splitter surface, which is configured to recombine the reference light with test light reflected from a test surface, the interferometric objective further comprising one or more optical elements positioned in the path of the input light and having positive or negative optical power, wherein the reference surface is curved and defines a window to pass the input light towards the beam ...
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      Mentions: Zygo
    11. Forward-viewing resonant fiber-optic scanning endoscope of appropriate scanning speed 
for 3D OCT imaging

      Forward-viewing resonant fiber-optic scanning endoscope of appropriate scanning speed 
for 3D OCT imaging
      A forward-viewing resonant fiber-optic endoscope of a scanning speed appropriate for a high-speed Fourier-domain optical coherence tomography (FD-OCT) system was developed to enable real-time, three-dimensional endoscopic OCT imaging. A new method was explored to conveniently tune the scanning frequency of a resonant fiber-optic scanner, by properly selecting the fiber-optic cantilever length, partially changing the mechanical property of the cantilever, and adding a weight to the cantilever tip. Systematic analyses indicated the resonant scanning frequency can be tuned over two orders of magnitude spanning from ~10Hz to ~kHz. Such a flexible scanning frequency range makes it possible to set an appropriate ...
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    12. Optical scanning system

      Optical scanning system
      The present application is directed to an optical scanning system for medical applications, preferably in ophthalmology, which can be used for a large range of diagnostic and therapeutic applications. The optical scanning system comprises at least one controllable reflector which has an actuator and which is arranged in a first imaging beam path for deflecting at least one therapy beam and/or diagnosis beam over a work field in a scanning manner, a second imaging beam path for a fixation beam which is imaged on the work field in a spatially fixed manner with respect to the optical axis of ...
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    13. Atherectomy system with imaging guidewire

      Atherectomy system with imaging guidewire
      Systems and methods of increasing blood flow in a blood vessel with ultraluminal plaque. One disclosed method includes inserting an imaging guidewire into the blood vessel to the intraluminal plaque, propelling a catheter with a working head over the guidewire towards the distal end of the guidewire, scanning with the imaging guidewire to generate a cross-section image, radially positioning the catheter using a positioning element, monitoring the image to ascertain that the working head is properly positioned and operating the working head to remove the plaque. A computerized system designed, constructed and configured to perform the methods is further disclosed.
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    14. Volcano Introduces Vibe™ Rx - the World's Only Vascular Imaging Balloon Catheter

      Volcano Introduces Vibe™ Rx - the World's Only Vascular Imaging Balloon Catheter
      Volcano Corporation (NASDAQ: VOLC) announced today that it has received CE Mark approval for the VIBE™ RX Vascular Imaging Balloon Catheter. The company also announced that it has completed its first clinical cases with the VIBE™ RX in New Zealand. A single VIBE™ RX Catheter can quickly access, prepare, and assess challenging lesions. IVUS guidance provides precise, targeted balloon dilatation with immediate confirmation of interventional results. "VIBE™ RX represents the first of what we believe will be many Volcano image-guided therapy devices designed to allow physicians to see more detail right at the point of the therapy," commented Scott Huennekens ...
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    15. Access system

      Access system
      The invention provides systems and methods for providing access to a target site. Example systems may include a needle, a grid to guide the needle, a plate with an aperture, a member coupled to the plate and including a semispherical surface, and a hub slideably coupled to the plate by a guide. The system may also include a needle coupled to the hub, the needle including a magnetically trackable sensor positioned in a tip of the needle. The semispherical surface can be positioned against skin of a body and the hub slid relative to the plate along the guide to ...
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    16. 3D In Vivo optical coherence tomography based on a low-voltage, large-scan-range 2D MEMS mirror

      3D In Vivo optical coherence tomography based on a low-voltage, large-scan-range 2D MEMS mirror
      3D in vivo optical imaging on a mouse has been obtained using a 2D MEMS mirror for lateral scanning in a time-domain optical coherence tomography (OCT) system. The MEMS mirror aperture size is 1 × 1 mm2, and the device footprint is 2 × 2 mm2. The MEMS mirror scans ± 30° optical angles about both x and y-axis at only 5.5V DC voltage. An endoscopic probe with an outer diameter of 5.8 mm has been designed, manufactured and packaged. The probe scans an average transverse area of 2 mm × 2 mm. The imaging speed of the probe is about 2 ...
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    17. Catheter imaging probe and method

      Catheter imaging probe and method

      A catheter imaging probe for a patient. The probe includes a conduit through which energy is transmitted. The probe includes a first portion through which the conduit extends. The probe includes a second portion which rotates relative to the conduit to redirect the energy from the conduit. A method for imaging a patient. The method includes the steps of inserting a catheter into the patient. There is the step of rotating a second portion of the catheter relative to a conduit extending through a first portion of the catheter, which redirects the energy transmitted through the conduit to the patient ...

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    18. Looking for a new generation of MEMS-type confocal microscopes

      Looking for a new generation of MEMS-type confocal microscopes
      In the field of optical scanning microscopy the micro-scale or nano-scale samples are observed and analysed via large macro-tools, too bulky and heavy for individual use in specialised key missions such as in situ or in vivo measuring. A need for compact, robust scanning devices for endoscopic applications has stimulated the development of MEMS scanning mirrors for confocal imaging and for optical coherence tomography. The architecture of proposed on-chip confocal microscope is shown in Fig. 1 [1]. The individual microscope consists of two microlens scanner chips, a beamsplitter, a PIN detector and a pinhole aperture. The microlens scanner chips have ...
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    19. Tomophase Receives Seventh Patent: Delivering Light via Optical Waveguide and Multiview Optical Probe Head

      Tomophase Receives Seventh Patent: Delivering Light via Optical Waveguide and Multiview Optical Probe Head
      BURLINGTON, Mass.--(BUSINESS WIRE)--Tomophase Corporation, a leading developer of non-invasive optical coherence tomography (OCT) tissue imaging devices, announced today that it has received notification of the issuance of its seventh patent: Delivering Light via Optical Waveguide and Multi-view Opt
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    20. Pixelation effect removal from fiber bundle probe based optical coherence tomography imaging

      Pixelation effect removal from fiber bundle probe based optical coherence tomography imaging
      A method of eliminating pixelization effect from en face optical coherence tomography (OCT) image when a fiber bundle is used as an OCT imaging probe is presented. We have demonstrated that applying a histogram equalization process before performing a weighted-averaged Gaussian smoothing filter to the original lower gray level intensity based image not only removes the structural artifact of the bundle but also enhances the image quality with minimum blurring of object’s image features. The measured contrast-to-noise ratio (CNR) for an image of the US Air Force test target was 14.7dB (4.9dB), after (before) image processing. In ...
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    21. System and method for positioning a probe

      System and method for positioning a probe
      An adapter couples a length of optical fiber to a hollow probe and to an optical coherence tomography instrument. The length of optical fiber may be greater than the length of the adapter itself. The optical fiber is fixed to an optical coupler at a proximal end of the adapter and may be maintained in a curved configuration by features located in an internal cavity of the adapter. An optical fiber advance mechanism be used to advance and/or retract the length of optical fiber to align it within the hollow probe.
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    22. Arterial probe for OCT

      Arterial probe for OCT
      An apparatus and associated method for detecting vulnerable plaque within a lumen defined by an intraluminal wall is described. The apparatus includes a probe having a distal portion and a proximal portion. The apparatus includes an optical waveguide extending along the probe. The optical waveguide is configured to carry optical radiation between the distal and proximal portions, and has a distal end in communication with the intraluminal wall. The apparatus includes an interferometer coupled to the optical waveguide and configured to provide an interference signal for sub-surface imaging of the intraluminal wall, and a processing module configured to provide spectroscopic ...
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    241-264 of 376 « 1 2 ... 8 9 10 11 12 13 14 15 16 »
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