1. Articles in category: Patents

    1-24 of 2003 1 2 3 4 ... 82 83 84 »
    1. Apparatus and methods for facilitating at least partial overlap of dispersed ration on at least one sample

      Apparatus and methods for facilitating at least partial overlap of dispersed ration on at least one sample

      Exemplary embodiments of apparatus and method according to the present disclosure are provided. For example, an apparatus for providing electromagnetic radiation to a structure can be provided. The exemplary apparatus can include a first arrangement having at least two wave-guides which can be configured to provide there through at least two respective electromagnetic radiations with at least partially different wavelengths from one another. The exemplary apparatus can also include a dispersive second arrangement structured to receive the electro-magnetic radiations and forward at least two dispersed radiations associated with the respective electro-magnetic radiations to at least one section of the structure ...

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    2. Method and apparatus for imaging of vessel segments

      Method and apparatus for imaging of vessel segments

      An apparatus, method and software arrangement for imaging a surface of a structure that is in contact with an opaque fluid is provided. The apparatus includes an article of manufacture (e.g., a housing), a fluid delivery arrangement and an imaging arrangement. The housing includes an aperture formed in the article of manufacture. The fluid delivery arrangement is configured to deliver a volume of substantially transparent fluid to the aperture formed in the housing. The imaging arrangement is configured to image the surface of the structure using an imaging modality after the volume of the transparent fluid is delivered to ...

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    3. Systems and methods for sub-aperture based aberration measurement and correction in interferometric imaging

      Systems and methods for sub-aperture based aberration measurement and correction in interferometric imaging

      Systems and methods for sub-aperture correlation based wavefront measurement in a thick sample and correction as a post processing technique for interferometric imaging to achieve near diffraction limited resolution are described. Theory, simulation and experimental results are presented for the case of full field interference microscopy. The inventive technique can be applied to any coherent interferometric imaging technique and does not require knowledge of any system parameters. In one embodiment of the present invention, a fast and simple way to correct for defocus aberration is described. A variety of applications for the inventive method are presented.

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    4. Optical coherence tomography system having real-time artifact and saturation correction

      Optical coherence tomography system having real-time artifact and saturation correction

      An optical coherence tomography system having real-time artifact and saturation correction includes an optical coherence tomography unit, and a signal processing and display system adapted to communicate with the optical coherence tomography unit to receive imaging signals therefrom. The optical coherence tomography system is a Fourier Domain optical coherence tomography system. The signal processing and display system includes a parallel processor configured to correct the imaging signals, in real time, to at least partially remove image artifacts and saturation based on a subset of image data within an image frame.

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    5. Apparatus and method for generating tomography image

      Apparatus and method for generating tomography image

      A method of generating a tomography image includes performing a depth scan on one spot on a surface of a subject using modulated light received from a spatial light modulator, obtaining depth scan data for each of a plurality of patterns of the spatial light modulator by repeating the depth scan on the spot for each of the plurality of patterns, forming a matrix R representing a vector space based on a correlation of signal values of the depth scan data for each of the plurality of patterns, performing a matrix decomposition on the matrix R, dividing the vector space ...

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    6. Determination of a material characteristic with the use of second-order photon correlation

      Determination of a material characteristic with the use of second-order photon correlation

      An optical system and method for characterizing an object is provided. The system includes at least one light source configured to direct photons toward an object and an interferometer configured to receive photons from the object. The system also includes at least one detector system adapted to detect an optical signal at an output of the interferometer and to remove, from the detected optical signal, a signal portion representing first order photon correlations, when present. The system also includes a processor configured to receive data relating to second-order correlated photons from said at least one detector system, each photon or ...

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    7. Multi-speed OCT swept source with optimized k-clock

      Multi-speed OCT swept source with optimized k-clock

      An optical coherence tomography system utilizes an optical swept source that frequency scans at least two different sweep rates. In this way, the system can perform large depth scans of the sample and then the same system can perform shorter depth high precision scans, in one specific example. In order to optimally use the analog to digital converter that samples the interference signal, the system further samples the interference signals at different optical frequency sampling intervals depending upon the selected sweep rates of the optical swept source. This allows the system to adapt to different sweep rates in an optimal ...

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    8. Lateral distortion corrected optical coherence tomography system

      Lateral distortion corrected optical coherence tomography system

      A lateral-distortion corrected optical coherence tomography system. The system can include an optical coherence tomography sensor, a light source, a fiber-optic system arranged to provide a reference beam and an observation beam, an optical detection system arranged to receive combined light from the reference beam and the observation beam and to provide detection signals, and a data processing system arranged to communicate with the optical detection system and receive the detection signals. The data processing system can be configured to assemble an image corresponding to a scanning path by constructing a plurality of A-scans from the detection signals, determining displacement ...

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    9. Device for optical coherence tomography

      Device for optical coherence tomography

      In certain embodiments, a device for optical coherence tomography (OCT) includes a signal detection device and a computer arrangement. The signal detection device is designed to detect an interference signal (G(.omega.)) for an object to be imaged in an optical frequency range (.omega.). The computer arrangement is designed to determine intermediate signals (G1(k), G2(k)) in a spatial frequency range (k) from the intermediate interference signal (G(.omega.)), whereby each of the intermediate signals (G1(k), G2(k)) is dispersion-compensated for a different depth (z1, z2) of the object. A locally resolved image signal (FFT1, FFT2) is determined ...

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    10. Dynamical Fabry-Perot tuneable filter device

      Dynamical Fabry-Perot tuneable filter device

      A Fabry-Perot tuneable filter device is described with reflecting elements separated by an optical path length to form an optical resonator cavity. A first actuator means is directly or indirectly coupled with a first reflecting element. And the first actuator means is configured to modulate the optical path length between first and second reflecting elements by a modulation amplitude to thereby sweep the optical resonator cavity through a band of optical resonance frequencies with a sweep frequency of 70 kHz or more. And the mechanical coupling between selected elements of the arrangement is sufficiently low such that when operated at ...

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    11. Systems and methods for improved acquisition of ophthalmic optical coherence tomography data

      Systems and methods for improved acquisition of ophthalmic optical coherence tomography data

      Systems and methods for improved acquisition of ophthalmic optical coherence tomography data are presented, allowing for enhanced ease of use and higher quality data and analysis functionality. Embodiments include automated triggering for detecting and initiating collection of OCT ophthalmic data, an automated technique for determining the optimal number of B-scans to be collected to create the highest quality image and optimize speckle reduction, automated review of fundus images collected with an adjunct imaging modality to guide the OCT data collection, a single scan protocol in which a large field of view is collected with HD B-scans embedded at different locations ...

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    12. Method and analysis system for eye examinations

      Method and analysis system for eye examinations

      An ophthalmological analysis system for examining an eye, in particular in the region of a front eye section of an eye includes first and second analysis systems obtaining sectional images of the eye. The first analysis system includes a projection device and a monitoring device arranged relative to each other according to the Scheimpflug rule. The second analysis system is an optical coherence interferometer. A processing device processes a first image data set obtained by the first analysis system and a second image data set obtained by the second analysis system to supplement the first image data set, at least ...

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    13. Interferometric force sensor for surgical instruments

      Interferometric force sensor for surgical instruments

      A surgical tool system according to an embodiment of the current invention includes a surgical tool, and an interferometry system optically coupled to the surgical tool. The surgical tool includes a body section, a sensor section at least one of attached to or integral with the body section, and a surgical section at least one of attached to or integral with the sensor section at an opposing end of the sensor section from the body section. The sensor section comprises an interferometric optical sensor defining a reference distance that changes in response to at least one of a force or ...

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    14. Image mapped optical coherence tomography

      Image mapped optical coherence tomography

      A method for imaging a sample. The method includes, during a single acquisition event, receiving depth-encoded electromagnetic (EM) fields from points on a sample that includes a first depth-encoded EM field for a first point and a second depth-encoded EM field for a second point, and redirecting the first depth-encoded EM field along a first predetermined direction to a first location on a dispersing re-imager and the second depthencoded EM field along a second pre-determined direction to a second location on the dispersing re-imager. The method further includes spectrally dispersing the first depthencoded EM field to obtain a first spectrum ...

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      Mentions: Rice University
    15. Imaging system producing multiple registered images of a body lumen

      Imaging system producing multiple registered images of a body lumen

      Systems, devices and methods for producing registered images of a body lumen are provided. The system includes a first imaging device having an imager positioned at a distal end thereof, said first imaging device configured to produce a first image of a body cavity; and an imaging system, including a second imaging device having an imager positioned at a distal end thereof and configured to be positioned approximate to said imager of said first imaging device within said body cavity and configured to produce a second image; an elongated member configured to contain said second imaging device; and at least ...

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    16. Apparatus and method of generating a tomographic image

      Apparatus and method of generating a tomographic image

      A method and an apparatus for generating a tomographic image are provided. The method for generating a tomographic image may involve: detecting a principal frequency region corresponding to a portion of a frequency data corresponding to a tomographic image, determining a plurality of sub frequency regions within the principal frequency region, and generating, by a processor, the tomographic image by synthesizing data of the plurality of sub frequency regions.

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      Mentions: Samsung
    17. Systems and methods for ultrasound imaging and insonation of microbubbles

      Systems and methods for ultrasound imaging and insonation of microbubbles

      A catheter system including an elongate tubular member having a proximal end portion, a distal end portion and a lumen extending through at least a portion of a length of the elongate tubular member. The distal end portion of the elongate member is dimensioned and adapted to advance to or in proximity to a treatment site of a subject. A microbubble device is in fluid communication with the lumen. The microbubble device includes at least one input port for receiving a flow of material into the device and an output port configured to output microbubbles from the microbubble device. A ...

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    18. Cryocatheter for introduction into a body vessel together with medical investigation and treatment equipment

      Cryocatheter for introduction into a body vessel together with medical investigation and treatment equipment

      A cryocatheter for introduction into a body vessel or into an organ, with a catheter inner surrounded by a catheter sheath, and with a catheter tip arranged at its distal end, with a feed line for an expansion or cooling agent arranged in the catheter sheath or the catheter inner, and with a balloon, arranged close to the catheter tip, which can be expanded and contracted again by means of the expansion and cooling agent, is to be constructed in such a way that by simple manipulation it can be positioned at a precise target position in the body vessel ...

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      Mentions: Siemens
    19. Ophthalmic apparatus and ophthalmic method

      Ophthalmic apparatus and ophthalmic method

      An ophthalmic apparatus includes a fundus image acquisition unit which acquires a plurality of fundus images acquired by imaging fundus of a subject's eye at different times and at least one fundus image that is fewer than the plurality of fundus images and acquired by imaging fundus of the subject's eye at a different time from those for the plurality of fundus images, a unit which generates a new fundus image by averaging the plurality of fundus images, an extraction unit which extracts a feature region from the generated new fundus image, and a unit which tracks the ...

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    20. Method for monitoring image of examinee's eye and monitoring system

      Method for monitoring image of examinee's eye and monitoring system

      A method for monitoring an image of an examinee's eye includes: obtaining first image data including a first examinee's eye image captured by a first ophthalmologic photographing apparatus, and additional information including type information on the first examinee's eye image; obtaining second image data including a second examinee's eye image captured by a second ophthalmologic photographing apparatus different from the first ophthalmologic photographing apparatus, and additional information including type information on the second examinee's eye image; recognizing the first examinee's eye image and the second examinee's eye image as the same type of ...

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      Mentions: Nidek
    21. Systems and methods for automated classification of abnormalities in optical coherence tomography images of the eye

      Systems and methods for automated classification of abnormalities in optical coherence tomography images of the eye

      Systems and methods for classifying abnormalities within optical coherence tomography images of the eye are presented. One embodiment of the present invention is the classification of pigment epithelial detachments (PEDs) based on characteristics of their internal reflectivity, size and shape. The classification can be based on selected subsets of the data located within or surrounding the abnormalities. Training data can be used to generate the classification scheme and the classification can be weighted to highlight specific classes of particular clinical interest.

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    22. Process, system and software arrangement for determining at least one location in a sample using an optical coherence tomography

      Process, system and software arrangement for determining at least one location in a sample using an optical coherence tomography

      A system, process and software arrangement are provided to determine at least one position of at least one portion of a sample. In particular, information associated with the portion of the sample is obtained. Such portion may be associated with an interference signal that includes a first electro-magnetic radiation received from the sample and a second electro-magnetic radiation received from a reference. In addition, depth information and/or lateral information of the portion of the sample, may be obtained. At least one weight function can be applied to the depth information and/or the lateral information so as to generate ...

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    23. Inflatable medical interfaces and other medical devices, systems, and methods

      Inflatable medical interfaces and other medical devices, systems, and methods

      An inflatable mask with two ocular cavities can seal against a user's face by forming an air-tight seal around the periphery of the user's eye socket. The sealed air-tight ocular cavity can be pressurized to take ocular measurements. The mask can conform to the contours of a user's face by inflating or deflating the mask. In addition, the distance between the user and a medical device (e.g. an optical coherence tomography instrument) can be adjusted by inflating or deflating the mask. Also disclosed herein is an electronic encounter portal and an automated eye examination. Other embodiments ...

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    1-24 of 2003 1 2 3 4 ... 82 83 84 »
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