Results 201 to 210 of about 4,947,056 (252)

Optical imaging with a directional detector

Journal of the Optical Society of America A, 2004
We demonstrate a new optical imaging technique based on a directional detector that measures the intensity of light waves that propagate only in a narrow angular window around a specific direction. Light waves that propagate in other directions do not significantly affect the detector output.
Yaron, Rabi, Sander, Stepanov, Moshe, Horowitz, Boris, Spektor   +3 more
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New Directions in Cardiac Imaging

Annals of Internal Medicine, 1985
Cardiac imaging is among the most commonly used diagnostic techniques in cardiovascular medicine. Conventional imaging modes (chest roentgenography, echocardiography, radionuclide imaging, and angiography) allow delineation of cardiac morphology, coronary anatomy, ventricular and valvular function, and cardiac shunts, and permit qualitative evaluation ...
D J, Skorton, S M, Collins
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Directional subband coding of images

International Conference on Acoustics, Speech, and Signal Processing, 2003
The authors present a novel subband coding method, directional subband coding of images. In order to match human visual sensitivity, an image is decomposed into a low-frequency component and many high-frequency directional components using a separable quadrature mirror filter and a directional filter.
Haibo Li, Zhenya He
openaire   +1 more source

Image-Directed Tumor Resection

Neurosurgery Clinics of North America, 1990
Intra-axial tumors can be localized by intraoperative real-time ultrasound, stereotactic computed tomography (CT), or magnetic resonance imaging (MRI). In the former, intraoperative ultrasound can help a surgeon find a tumor and assess the completeness of resection.
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Direct Imaging of Charge Modulation

Physical Review Letters, 1996
Electron diffraction calculation suggest that a modulation in the density of valence electrons may dominate the images of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} under certain experimental conditions. This prediction is supported by electron microscope experiments where we observe modulation that we attribute to charge transfer over a distance of
, Zhu, , Tafto
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Imaging Goal-Directed Movement

Research Quarterly for Exercise and Sport, 1995
The main purpose of the present investigation was to determine how Shepard's (1968) second-order isomorphic principle relates to imaging goal-directed movement. Reports of movement times for actual and imaged movements were obtained using Fitts-type tapping tasks.
R M, Kohl, S A, Fisicaro
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Imaging the Finger Force Direction

2007 IEEE Conference on Computer Vision and Pattern Recognition, 2007
This paper presents a method of imaging the coloration pattern in the fingernail and surrounding skin to infer fingertip force direction during planar contact. Nail images from 7 subjects were registered to reference images with RANSAC and then warped to an atlas with elastic registration.
Yu Sun 0004, John M. Hollerbach, Stephen A. Mascaro   +2 more
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Future Directions in Imaging Neurodegeneration

Current Neurology and Neuroscience Reports, 2017
Neuroimaging comprises a powerful set of instruments to diagnose various neurodegenerative disorders, clarifies their neurobiology, and monitors their treatment. Magnetic resonance imaging depicts volume changes, as well as abnormalities in functional and structural connectivity.
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The perceived direction of the binocular image

Vision Research, 1979
Abstract Despite small disparities between the two retinal images of an object, they may be perceived as a single binocular image. The aim of this study is to determine the direction in which this single binocular image is seen relative to where the monocular images would be seen if seen separately.
J E, Sheedy, G A, Fry
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DIRECT IMAGES OF STABLE TRIPLES

International Journal of Mathematics, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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