1. Massachusetts Institute of Technology

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    1. Mentioned In 552 Articles

    2. Optical Coherence Tomography of Ocular Diseases, Second Edition (Book)

      Optical Coherence Tomography of Ocular Diseases, Second Edition (Book)
      Optical Coherence Tomography of Ocular Diseases, Second Edition is a completely revised and updated version of this classic text. Incorporated within over 700 pages are a multitude of updated features unique to this edition including over 1,600 color images, state-of-the-art technology, and case presentations. These elements cohesively work together to successfully demonstrate the retina in normal and diseased states using the innovative Stratus OCTTM. Optical Coherence Tomography of Ocular ...
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    3. Identification and verification using complex, three-dimensional structural features

      Three-dimensional characteristics of a complex physical structure are used to generate a unique identifier. In effect, the characteristics reperesent the basis of a "physical one-way hash function" that faciliates ready derivation of an identifier based on the physical structure, the structure itself being very difficult to reproduce given only the identifier. The characteristics may be read using a non-contact probe and without the need for precise registration.
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    4. Fiber optic needle probes for optical coherence tomography imaging

      Fiber optic needle probes for optical coherence tomography imaging
      A fiber optic needle probe for measuring or imaging the internal structure of a specimen includes a needle defining a bore, an optical fiber substantially positioned within the bore, and a beam director in optical communication with the optical fiber. At least a portion of the wall of the needle is capable of transmitting light. The beam director directs light from the optical fiber to an internal structure being imaged ...
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    5. Fiber optic imaging endoscope interferometer with at least one faraday rotator

      Fiber optic imaging endoscope interferometer with at least one faraday rotator
      An imaging system for performing optical coherence tomography includes an optical radiation source; a reference optical reflector; a first optical path leading to the reference optical reflector; and a second optical path coupled to an endoscopic unit. The endoscopic unit preferably includes an elongated housing defining a bore; a rotatable single mode optical fiber having a proximal end and a distal end positioned within and extending the length of the ...
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    6. Methods and apparatus for forward-directed optical scanning instruments

      Methods and apparatus for forward-directed optical scanning instruments
      An imaging system for performing forward scanning imaging for application to therapeutic and diagnostic devises used in medical procedures. The imaging system includes forward directed optical coherence tomography (OCT), and non-retroreflected forward scanning OCT. Also interferometric imaging and ranging techniques and fluorescent, Raman, two-photon, and diffuse wave imaging can be used. The forward scanning mechanisms include a cam attached to a motor, pneumatic devices, a pivoting device, piezoelectric transducers, electrostatic ...
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    7. Interferometeric imaging with a grating based phase control optical delay line

      An apparatus for performing high speed scanning of an optical delay and its application for performing optical interferometry, ranging, and imaging, including cross sectional imaging using optical coherence tomography, is disclosed. The apparatus achieves optical delay scanning by using diffractive optical elements in conjunction with imaging optics. In one embodiment a diffraction grating disperses an optical beam into different spectral frequency or wavelength components which are collimated by a lens ...
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    8. Intraluminal fiber-optic Doppler imaging catheter for structural and functional optical coherence tomography

      We describe a miniature fiber-optic Doppler imaging catheter for integrated functional and structural optical coherence tomography (OCT) imaging. The Doppler catheter can map blood flow within a vessel as well as image vessel wall structures. A prototype Doppler catheter has been developed and demonstrated for measuring the intraluminal velocity profile in a vessel phantom (conduit). A simple mathematical model is demonstrated to estimate the total flow rate. This estimation technique ...
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    9. Grating based phase control optical delay line

      An apparatus for performing high speed scanning of an optical delay and its application for performing optical interferometry, ranging, and imaging, including cross sectional imaging using optical coherence tomography, is disclosed. The apparatus achieves optical delay scanning by using diffractive optical elements in conjunction with imaging optics. In one embodiment a diffraction grating disperses an optical beam into different spectral frequency or wavelength components which are collimated by a lens ...
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    10. 511-525 of 552 « 1 2 ... 32 33 34 35 36 37 »
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  2. About Massachusetts Institute of Technology

    Massachusetts Institute of Technology

    Massachusetts Institute of Technology (MIT) is a private, coeducational research university located in Cambridge, Massachusetts. MIT has five schools and one college, containing 32 academic departments, with a strong emphasis in theoretical, applied, and interdisciplinary scientific and technological research.  Laser Medicine and Medical Imaging Group at MIT.  The RLE Laser Medicine and Medical Imaging Group and its close collaborators were the originators of optical coherence tomography (OCT), a diagnostic technology now used in a growing number of medical fields. The group currently works to further understand and exploit the capabilities of OCT technology, with ongoing investigations in topics related to optical coherence microscopy development and optical biopsy using OCT.