< More ImagingSubscribe to our E-NewslettersImaging Tech Pulse (5/24/2016)
Imaging Tech Pulse
Imaging Tech Pulse is a special edition newsletter from Photonics Media and PCO covering key developments in imaging technology.
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May 2016
Imaging Tech Pulse is a special edition newsletter from Photonics Media and PCO-TECH Inc. covering key developments in imaging technology.
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VESCEL-Based Laser Achieves Single-Source Multimodal Imaging
A solid-state degenerate laser system that can provide efficient methods of coherence switching has demonstrated the ability to provide both speckled and speckle–free images. The technology enables multimodality imaging from a single laser, where low spatial coherence illumination can be used for traditional high-speed videomicroscopy and high spatial coherence illumination for extracting dynamic information of flow processes. Although multimodality imaging has been achieved previously using different light sources, it has been challenging to maintain optical alignment during switching and adjust for mismatches in illumination intensity.
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Third-Harmonic Generation Microscopy Provides In Situ Brain Tumor Imaging
A technique involving third-harmonic generation microscopy could allow neurosurgeons to image and assess brain tumor boundaries during surgery, providing optical biopsies in near-real time and increasing the accuracy of tissue removal. Pathologists typically use staining methods, in which chemicals like hematoxylin and eosin turn different tissue components blue and red, revealing its structure and whether there are any tumor cells. A definitive diagnosis can take up to 24 hours, meaning surgeons may not realize some cancerous tissue has escaped from their attention until after surgery -- requiring a second operation and more risk.
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Robust Technique for Ghost-Imaging in the Time Domain
A technique for producing ghost-imaging in the time domain offers promise for the dynamic imaging of ultrafast waveforms with applications in communications, remote sensing and ultrafast spectroscopy. Researchers from the Tampere University of Technology and the University of Eastern Finland have demonstrated how ultrafast pulses that carry information over durations <1 billionth of a second can be detected without actually “seeing" those pulses directly. The method correlates in time the intensity of two light beams, neither of which independently carries information about the signal.
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IR Imaging Differentiates Skin from Other Materials
Systems using IR wavelengths to distinguish skin from other materials hold promise for improving search and rescue efforts and defending against efforts to deceive biometric systems. The proliferation of face-recognizing biometric systems for security — in settings ranging from public buildings and transportation to secure data centers — has, in turn, fueled efforts to circumvent or outwit these systems. Conventional imaging systems can be deceived by masks or other facial reproductions because they verify faces by comparing a reference image to a captured image, which can be falsified.
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