1. Articles from uspto.gov

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  2. 1-24 of 1839 1 2 3 4 ... 75 76 77 »
    1. Photonic device and optical coherence tomography apparatus including the photonic device as light source

      Photonic device and optical coherence tomography apparatus including the photonic device as light source

      Provided is a photonic device in which emission intensity in a short wavelength region is suppressed even in the case of increasing carrier injection density so as to obtain a wide spectrum half-maximum width as well as a high output. The photonic device includes: a first cladding layer; a second cladding layer; and an active layer including an emitting layer and a barrier layer and being provided between the first cladding layer and the second cladding layer, the emitting layer emitting light in a spectrum having a center wavelength .lamda.c and a spectrum half-maximum width .DELTA..lamda., in which ...

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    2. Optical coherence tomography guided epiretinal membrane peeling

      Optical coherence tomography guided epiretinal membrane peeling

      An epiretinal membrane (ERM) visualization system includes an OCT system operable to generate an OCT image of a region of a patient's eye, the region of the patient's eye including an ERM. The ERM visualization system further includes an image processing unit operable to process the OCT image to identify the ERM by differentiating the ERM from other structures within the region of the patient's eye and generate an ERM map depicting one or more characteristics (including at least a location of a portion of the ERM within the region of the patient's eye) of the ...

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      Mentions: Lingfeng Yu
    3. Devices, systems, and methods for calibrating an OCT imaging system in a laser surgical system

      Devices, systems, and methods for calibrating an OCT imaging system in a laser surgical system

      An adjustment system for an Optical Coherence Tomography (OCT) imaging system includes an OCT light source; a beam splitter, splitting the OCT light beam into an imaging beam to an imaging arm, and a reference beam to a reference arm; a probe, guiding the imaging beam onto a target and receiving a returned imaging beam from the target; the beam splitter generating an interference beam from the returned imaging beam and a returned reference beam from the reference arm; an imaging detector, detecting the interference beam; an imaging processor, generating an OCT image from the detected interference beam; and an ...

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      Mentions: Lingfeng Yu
    4. Signal normalization among multiple optical coherence tomography devices

      Signal normalization among multiple optical coherence tomography devices

      The present disclosure is directed to systems and methods for normalizing an image of an eye among multiple optical coherence tomography (OCT) devices. The system can receive an OCT image and generate a normalized OCT image. The system is configured to normalize a sample density of the received image, normalize an amount of noise using a suitable noise reduction technique, normalize a distribution of signal amplitudes of the image, and then normalize a signal quality of the image. The resulting normalized image of the eye can then be used in the comparison among OCT images taken from multiple OCT devices.

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    5. Widely tunable short cavity laser

      Widely tunable short cavity laser

      A tunable source includes a short-cavity laser optimized for performance and reliability in SSOCT imaging systems, spectroscopic detection systems, and other types of detection and sensing systems. The short cavity laser has a large free spectral range cavity, fast tuning response and single transverse, longitudinal and polarization mode operation, and includes embodiments for fast and wide tuning, and optimized spectral shaping. Disclosed are both electrical and optical pumping in a MEMS-VCSEL geometry with mirror and gain regions optimized for wide tuning, high output power, and a variety of preferred wavelength ranges; and a semiconductor optical amplifier, combined with the short-cavity ...

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    6. Imaging apparatus for diagnosis, information processing apparatus, and control method thereof, program thereof, and computer-readable storage medium thereof

      Imaging apparatus for diagnosis, information processing apparatus, and control method thereof, program thereof, and computer-readable storage medium thereof

      A technique is disclosed for helping prevent image quality of a three-dimensional image from becoming poor due to fluctuations in the rotation speed of an imaging core. For this purpose, if data is obtained from the imaging core by moving and rotating the imaging core, a cross-sectional image is generated at each movement position. Then, a direction where a guidewire is present in each of the cross-sectional images is detected. An angular difference between the direction of the detected guidewire and a preset direction is obtained so as to rotate each of the cross-sectional images in accordance with the angular ...

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    7. Wavelength encoded multi-beam optical coherence tomography

      Wavelength encoded multi-beam optical coherence tomography

      Optical coherence tomography (OCT) apparatuses and methods include a first electro-magnetic radiation (EMR) source providing EMR to a first optical path associated with a sample and a second optical path associated with a reference. A multi-beam generator unit (MBGU) generates first and second EMR beams having different wavelength contents. A scanning system illuminates the sample with the first and second EMR beams, at a first and second time, at a first and second location. An interference module generates interference signals based on received EMR returning from the reference and the first and second EMR beams returning from the sample. A ...

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    8. Apparatus and method of image registration

      Apparatus and method of image registration

      A method for bringing an IVUS and an OCT image into register. In one embodiment, the method includes obtaining an IVUS image of an area of a lumen; obtaining an OCT image of the same area of the lumen; determining the same asymmetry in each of the IVUS and OCT images; and overlaying the IVUS and OCT images and rotating them with respect to one another until the asymmetry in each of the IVUS and OCT images are in register, and determining the angle of rotation that resulted in the registration. In another aspect, the invention relates to a probe ...

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    9. Methods and apparatus for utilizing impeller-based rotationally-scanning catheters

      Methods and apparatus for utilizing impeller-based rotationally-scanning catheters

      An ablation catheter includes a tubular catheter body having a lumen, a tip portion, a liquid inlet, at least one liquid outlet, a liquid flow path defined between the liquid inlet and the liquid outlet, and an ablation element mounted on the tip portion of the catheter body. A rotationally-scanning ultrasound assembly is disposed within the lumen of the catheter body adjacent the tip portion. The ultrasound assembly includes an ultrasound transducer having an active face, an acoustic mirror acoustically coupled to the active face of the ultrasound transducer, and an impeller positioned in the liquid flow path and operably ...

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      Mentions: St. Jude Medical
    10. Methods and systems for integrated imaging using optical coherence tomography and photoacoustic imaging

      Methods and systems for integrated imaging using optical coherence tomography and photoacoustic imaging

      Systems and methods for photoacoustic imaging are provided. Photoacoustic signals are excited from a body and the excited photoacoustic signals are detected with a low coherence interferometer system serving as a photoacoustic detector. Cross-sectional images of the body are then reconstructed by the system from the detected photoacoustic signals.

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    11. Systems and methods for ocular anterior segment tracking, alignment, and dewarping using optical coherence tomography

      Systems and methods for ocular anterior segment tracking, alignment, and dewarping using optical coherence tomography

      The present application discloses methods and systems to track the anterior segment while establishing a position of the delay which will permit good control of the placement of anterior segment structures. This allows accurate dewarping by maximizing the amount of corneal surface that is imaged as well as reducing or eliminating overlap between real and complex conjugate images present in frequency-domain optical coherence tomography. A method to dewarp surfaces given partial corneal surface information is also disclosed.

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    12. Surgical microscope with integrated optical coherence tomography and display systems

      Surgical microscope with integrated optical coherence tomography and display systems

      An ophthalmic surgical microscope includes a beam coupler positioned along an optical path of the surgical microscope between a first eyepiece and magnifying/focusing optics, the beam coupler operable to direct the OCT imaging beam along a first portion of the optical path of the surgical microscope between the beam coupler and a patient's eye (an OCT image being generated based on a reflected portion of the OCT imaging beam). The surgical microscope additionally includes a real-time data projection unit operable to project the OCT image generated by the OCT system and a beam splitter positioned along the optical ...

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      Mentions: Lingfeng Yu
    13. Systems and methods for deep spectroscopic imaging of biological samples with use of an interferometer and spectrometer

      Systems and methods for deep spectroscopic imaging of biological samples with use of an interferometer and spectrometer

      Disclosed herein are systems and methods for deep spectroscopic imaging of a biological sample. In an aspect, a system includes a broad bandwidth light source configured to generate an illumination beam, an interferometer, and a spectrometer. The interferometer includes a first beam splitter configured to split the illumination beam into an incident beam and a reference beam; an optical lens directs the incident beam onto a biological sample at a predefined offset from corresponding optical axis, and receive a beam scattered from the biological sample. The beams are configured to intersect with each other within a focal zone of the ...

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    14. Image processing apparatus, image processing method, and optical coherence tomography apparatus

      Image processing apparatus, image processing method, and optical coherence tomography apparatus

      An image processing apparatus converts an intensity distribution of at least one of a plurality of regions of a tomographic image of an eye by using an amount of conversion which is greater than an amount of conversion used to convert an intensity distribution of another one of the plurality of regions, the tomographic image being obtained by performing tomographic imaging on the eye by using optical interference.

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    15. Method and system for low coherence interferometry

      Method and system for low coherence interferometry

      Optical Coherence Tomography (OCT) system and apparatus of this instant application is very useful for diagnosis and management of 3ophthalmic diseases such as retinal diseases and glaucoma etc. Instant innovative OCT diagnostic system leverages advancements in cross technological platforms. The Michelson interferometric system presented in this application could be used for the OCT imaging, which includes biological OCT imaging, medical OCT imaging, ophthalmic OCT imaging, corneal OCT imaging, retinal OCT imaging, and the like. A tunable filter is placed in front of the detector to make the interferometer more sensitive and accurate for examining various samples for diagnosis.

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    16. Anterior ocular segment optical coherence tomographic imaging device and anterior ocular segment optical coherence tomographic imaging method

      Anterior ocular segment optical coherence tomographic imaging device and anterior ocular segment optical coherence tomographic imaging method

      An anterior ocular segment optical coherence tomographic imaging device and an anterior ocular segment optical coherence tomographic imaging method that can accurately analyze the shape of a crystalline lens by identifying the boundary of each layer of the crystalline lens in a tomographic image of an anterior ocular segment of a subject's eye, which is taken by optical coherence tomography. A layer boundary detector calculates brightness gradients from brightness values in a tomographic image of an anterior ocular segment of a subject's eye, which is taken by optical coherence tomography, in a depth direction of the tomographic image ...

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    17. Systems and methods for performing truncated-correlation photothermal coherence tomography

      Systems and methods for performing truncated-correlation photothermal coherence tomography

      Photothermal imaging systems and methods are disclosed that employ truncated-correlation photothermal coherence tomography (TC-PCT). According to the example methods disclosed herein, photothermal radiation is detected with an infrared camera while exciting a sample with the chirped delivery of incident laser pulses (where the pulses have a fixed width), and time-dependent photothermal signal data is obtained from the infrared camera and processed using a time-evolving filtering method employing cross-correlation truncation. The cross-correlation truncation method results in pulse-compression-linewidth-limited depth-resolved images with axial and lateral resolution well beyond the well-known thermal-diffusion-length-limited, depth-integrated nature of conventional thermographic and thermophotonic modalities. As a consequence, an ...

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    18. Apparatus to detect amyloid in a patient user's retina in a diagnosis, advancement and prognosis of alzheimer's disease, traumatic brain injury, macular degeneration and a plurality of neurodegenerative disorders and ocular diseases

      Apparatus to detect amyloid in a patient user's retina in a diagnosis, advancement and prognosis of alzheimer's disease, traumatic brain injury, macular degeneration and a plurality of neurodegenerative disorders and ocular diseases

      An eye imaging apparatus to produce an image of an eye of a patient user is disclosed. The eye imaging apparatus may include a video camera, a slit lamp chinrest, a camera housing, a plurality of illumination source optics and a processing system. The eye imaging apparatus may also include a video camera, a plurality of video camera optics, a camera housing, a microscope assembly, a plurality of illumination source optics and a floor base. The eye imaging apparatus may be utilized in combination with one or more contrasting agents. The eye imaging apparatus may detect amyloid-beta plaque, amyloid or ...

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    19. Spatial 3D sterioscopic intraoral camera system

      Spatial 3D sterioscopic intraoral camera system

      Spatial 3D stereoscopic video is generated with a dual camera subassembly in a hand held device. The 3D Left-Right Multiplexed Spatial Stereoscopic video stream is wirelessly coupled to a processing system for simultaneous visualization comparison with intraoral cavity digital dental impression 3D CAD formatted files, Cone Beam Panoramic Computed Tomography images, Optical Coherence Tomography planar images and Panoramic X-ray image digital files for Stereoscopic visualization on stereoscopic displays and occluding viewing glasses.

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    20. Apparatus, systems, methods and computer-accessible medium for spectral analysis of optical coherence tomography images

      Apparatus, systems, methods and computer-accessible medium for spectral analysis of optical coherence tomography images

      According to an exemplary embodiment of the present disclosure, apparatus and method can be provided for generating information for at least one structure. For example, using at least one first arrangement, it is possible to receive at least one first radiation from the at least one structure and at least one second radiation from a reference, and interfere the first and second radiations to generate at least one third radiation. Further, with at least one second arrangement, it is possible to generate spectroscopic data as a function of the at least one third radiation, and reduce at least one scattering ...

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    21. Optical coherence tomography device and optical coherence tomography control program

      Optical coherence tomography device and optical coherence tomography control program

      An optical coherence tomography device includes: an OCT optical system configured to obtain a OCT signal; a front observation optical system configured to obtain a front image of the test substance; and a controller is configured to: control the OCT optical system to obtain first temporally different OCT signals with respect to the test substance; control the front observation optical system to obtain a first front image of the test substance at the time the first OCT signals are obtained; control the front observation optical system to obtain a second front image of the test substance after that; determine whether ...

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      Mentions: Nidek
    22. Optical coherence microscopy system having a filter for suppressing a specular light contribution

      Optical coherence microscopy system having a filter for suppressing a specular light contribution

      The invention relates to an optical coherence microscopy system for fast, phase resolved imaging by means of optical coherence microscopy with decoupled illumination and detection apertures, producing a dark-field effect with an enhanced optical contrast. The setup uses a light source with an appropriate temporal coherence, an interferometer and an array detector combined with a spectrometer. The dark-field effect is produced by optical filter means in the illumination and detection paths, positioned in conjugated planes of the sample microscope objective. These optical means comprise for example refractive or diffractive elements, amplitude or phase masks, or programmable spatial light modulators. The ...

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    23. Optical coherence tomography for biological imaging

      Optical coherence tomography for biological imaging

      Described herein are catheters for use with Optical Coherence Tomography (OCT) that include an optical fiber core having a first refractive index and an interface medium having a second refractive index, where the first and second refractive indexes are mismatched such that receiving electronics configured to receive optical radiation reflected from the reference interface and the target operate in a total noise range that is within 5dB of the shot noise limit. These OCT catheters may include a silicon die mirror having a reflective coating that is embedded in the interface medium. The optical fiber can be fixed at just ...

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    1-24 of 1839 1 2 3 4 ... 75 76 77 »
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