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High Resolution Laser Speckle Imaging of Blood Flow

Prof. Guillermo Aguilar and his colleagues from the University of California, Riverside have developed a new approach to laser speckle imaging, called Laser Speckle Optical Flow Imaging (LSOFI) to be used for autonomous blood vessel detection and as a qualitative tool for blood flow visualization. LSOFI works by capturing the speckle displacement caused by different physical behavior and use the data to create a mapped image. It has been shown that LSOFI has many advantages over LSCI methods both in temporal and spatial resolution. Namely, LSOFI can be used to produce higher resolution images compared with the LSCI method using less frames. Combining this technology with Graphics Processing Unit (GPU) computation increases the speed of LSOFI, so GPU enabled LSOFI shows potential to create a fast and fully functional quasi-real time blood flow imaging system.  Fig 1: Comparison of blood flow imaging techniques applied to the raw image. The shown results are for Laser Speckle Optical Flow Imaging (LSOFI) using the Farneback Optical Flow algorithm, traditional Laser Speckle Imaging (LSI), and Temporal Frame Averaging (sLASCA).  

Enhanced Block Copolymer Self-Assembly

Brief description not available

Optical Frequency Stabilized Phase Locked Loop

Brief description not available

Thermally and Chemically-Stable Core-Shell Silver Nanowires with SnOx Coating

Brief description not available

III-N Based Material Structures and Circuit Modules Based on Strain Management

Brief description not available

High Mobility Group-III Nitride Transistors with Strained Channels

Brief description not available

(Al, In,Ga, B)N Device Structures

Brief description not available

3D Hole Injectors for InAlGaN Light-Emitting Diodes

Brief description not available

Volumetric Hole Injection with Intentional V-Defects

Brief description not available

Incorporating Temperature-Sensitive Layers in III-N Devices

Brief description not available

Enhanced Hole Injection by P-Type Active Region and Lateral Injection in InAlGaN LEDs

Brief description not available

In-Situ Methods Of Preventing Interfacial Impurities And Dry Etch-Induced Damage In Regrown III-Nitride Structures

Brief description not available

Improved Light Extraction with Geometrically Tuned LED Arrays

Brief description not available

Selective-Area Mesoporous Semiconductors And Devices For Optoelectronic And Photonic Applications

Brief description not available

Burying Impurities And Defects In Regrown III-Nitride Structures

Brief description not available

Enabling Epitaxial Growth On Thin Substrates

Brief description not available

Deep Ultraviolet Laser Pumped by Trap-Assisted Two Photon Absorption

Brief description not available

Gallium-containing MicroLEDs for Displays

Brief description not available

Edge-Emitting Laser Diode with Via-Activated Tunnel Junction Contact

Brief description not available

Near-Infrared, Flip-Chip, TCO-Clad, InGaN Quantum Dot Laser Diode

Brief description not available

Wavelength-Selective Phosphor Coating for Laser Lighting Devices

Brief description not available

III-Nitride VCSEL with a High Indium Content Active Region

Brief description not available

Formation of Transparent Integrated MicroLED Displays

Brief description not available

III-Nitride Based VCSEL with Curved Mirror on P-Side of the Aperture

Brief description not available

Curved Holographic Integrated Grating Lenses for Augmented and Virtual Reality

UCLA researchers in the Department of Electrical and Computer Engineering have developed a novel holographic grating design that achieves high-resolution, high-performance and high-efficiency display in augmented and virtual reality.

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