1. Kenneth K. C. Lee

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    1. Mentioned In 18 Articles

    2. Graphics processor unit acceleration enables realtime endovascular Doppler optical coherence tomography imaging

      Graphics processor unit acceleration enables realtime endovascular Doppler optical coherence tomography imaging
      Endovascular Optical Coherence Tomography (OCT) has previously been used in both bench-top and clinical environments to produce vascular images, and can be helpful in characterizing, among other pathologies, plaque build-up and impedances to normal blood ow. The raw data produced can also be processed to yield high- resolution blood velocity information, but this computation is expensive and has previously only been available a posteriori using post-processing software. Real-time Doppler OCT ...
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    3. Histogram flow mapping with optical coherence tomography for in vivo skin angiography of hereditary hemorrhagic telangiectasia

      Histogram flow mapping with optical coherence tomography for in vivo skin angiography of hereditary hemorrhagic telangiectasia
      ...lar Malformation Consortium HHT Investigator Group ; Victor X. D. Yang Author Affiliations Kyle H. Y. Cheng, Kenneth K. C. Lee University of Toronto, Edward S. Rogers Sr. Department of Electrical and Computer Engineer...
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    4. In vivo feasibility of endovascular Doppler optical coherence tomography

      In vivo feasibility of endovascular Doppler optical coherence tomography
      Feasibility of detecting intravascular flow using a catheter based endovascular optical coherence tomography (OCT) system is demonstrated in a porcine carotid model in vivo. The effects of A-line density, radial distance, signal-to-noise ratio, non-uniform rotational distortion (NURD), phase stability of the swept wavelength laser and interferometer system on Doppler shift detection limit were investigated in stationary and flow phantoms. Techniques for NURD induced phase shift artifact removal were developed by ...
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    5. Real-time speckle variance swept-source optical coherence tomography using a graphics processing unit

      Real-time speckle variance swept-source optical coherence tomography using a graphics processing unit
      Abstract: Advances in swept source laser technology continues to increase the imaging speed of swept-source optical coherence tomography (SS-OCT) systems. These fast imaging speeds are ideal for microvascular detection schemes, such as speckle variance (SV), where interframe motion can cause severe imaging artifacts and loss of vascular contrast. However, full utilization of the laser scan speed has been hindered by the computationally intensive signal processing required by SS-OCT and SV ...
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    6. Intraoperative handheld optical coherence tomography forward-viewing probe: physical performance and preliminary animal imaging

      Intraoperative handheld optical coherence tomography forward-viewing probe: physical performance and preliminary animal imaging
      A prototype intraoperative hand-held optical coherence tomography (OCT) imaging probe was developed to provide micron resolution cross-sectional images of subsurface tissue during open surgery. This new ergonomic probe was designed based on electrostatically driven optical fibers, and packaged into a catheter probe in the form factor of clinically accepted Bayonet shaped neurosurgical probes. Optical properties of the probe were measured to have a ~20 μm spot size, 5 mm working ...
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    7. Neurosurgical hand-held optical coherence tomography (OCT) forward-viewing probe

      Neurosurgical hand-held optical coherence tomography (OCT) forward-viewing probe
      A prototype neurosurgical hand-held optical coherence tomography (OCT) imaging probe has been developed to provide micron resolution cross-sectional images of subsurface tissue during open surgery. This new ergonomic hand-held probe has been designed based on our group's previous work on electrostatically driven optical fibers. It has been packaged into a catheter probe in the familiar form factor of the clinically accepted Bayonet shaped neurosurgical non-imaging Doppler ultrasound probes. The ...
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    8. Endovascular optical coherence tomography intensity kurtosis: visualization of vasa vasorum in porcine carotid artery

      Endovascular optical coherence tomography intensity kurtosis: visualization of vasa vasorum in porcine carotid artery
      lication of speckle variance optical coherence tomography (OCT) to endovascular imaging faces difficulty of extensive motion artifacts inherently associated with arterial pulsations in addition to other physiological movements. In this study, we employed a technique involving a fourth order statistical method, kurtosis, operating on the endovascular OCT intensity images to visualize the vasa vasorum of carotid artery in vivo and identify its flow dynamic in a porcine model. The intensity ...
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    9. Simultaneous 6-channel optical coherence tomography using a high-power telescope-less polygon-based swept laser in dual amplifier configuration

      Simultaneous 6-channel optical coherence tomography using a high-power telescope-less polygon-based swept laser in dual amplifier configuration
      ...Michael K. K. Leung and Adrian Mariampillai Univ. of Toronto (Canada) Beau A. Standish Ryerson Univ. (Canada) Kenneth K. C. Lee and I. Alex Vitkin Univ. of Toronto (Canada) Victor X. D. Yang Ryerson Univ. (Canada) Multic...
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    10. Feature Of The Week 2/28/10: Multichannel optical coherence tomography using a high-power telescope-less polygon-based swept laser in dual-amplifier configuration

      Feature Of The Week 2/28/10: Multichannel optical coherence tomography using a high-power telescope-less polygon-based swept laser in dual-amplifier configuration
      Feature Of The Week 2/28/10: Researchers at the University of Toronto, Ontario Cancer Institute and Ryerson University have been actively advancing Optical Coherence Tomography (OCT) in several areas, including application of Doppler OCT (DOCT) and advancing the underlying technology to expand and improve the applications and capability of this imaging modality. The group, led by Dr. Alex Vitkin and Dr. Victor Yang, has clinical experience in circulation imaging ...
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    11. Doppler optical coherence tomography for interventional cardiovascular guidance: in vivo feasibility and forward-viewing probe flow phantom demonstration

      Doppler optical coherence tomography for interventional cardiovascular guidance: in vivo feasibility and forward-viewing probe flow phantom demonstration
      ...Princess Margaret Hospital, 610 University Avenue, Room 7-411, Toronto, Ontario M5G 2M9, Canada Louis Tan and Kenneth Lee University of Toronto, Division of Engineering Science, 35 St....
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    12. In vivo endoscopic multi-beam optical coherence tomography

      In vivo endoscopic multi-beam optical coherence tomography
      multichannel optical coherence tomography (multi-beam OCT) system and an in vivo endoscopic imaging probe were developed using a swept-source OCT system. The distal optics were micro-machined to produce a high numerical aperture, multi-focus fibre optic array. This combination resulted in a transverse design resolution of <10 µm full width half maximum (FWHM) throughout the entire imaging range, while also increasing the signal intensity within the focus of the individual channels ...
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    13. 1-15 of 18 1 2 »
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  2. About Kenneth K. C. Lee

    Kenneth K. C. Lee

    Kenneth Lee is a student in the Laser Photonics Fabrication Group at the University of Toronto.