Results 291 to 300 of about 558,215 (330)

Positron Source Available for Positron Annihilation Measurement

open access: yesPositron Source Available for Positron Annihilation Measurement
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Positron-Emission Tomography

Annual Review of Neuroscience, 1980
An understanding of disease processes in the human brain must ultimately be based on a knowledge of the underlying regional hemodynamic, metabolic, and biochemical changes. Although some such information is currently available from various animal models, the conflicting nature of these data often leaves many important questions unanswered and ...
M M, Ter-Pogossian   +2 more
openaire   +4 more sources

Positron emission tomography

Physics in Medicine and Biology, 1988
The developments in positron emission tomography (PET) are reviewed with an emphasis on instrumentation for clinical PET imaging. After a brief summary of positron imaging before the advent of computed tomography, various improvements are highlighted including the move from PET scanners with septa to fully 3D scanners, changes in the preferred ...
Gerd, Muehllehner, Joel S, Karp
openaire   +5 more sources

Positron binding: A positron-density viewpoint

Physical Review A, 1994
The binding of a single positron to a many-electron system (in the field of a fixed nuclear configuration) is viewed in terms of positron and electron densities. Following the treatments due to Levy and co-workers [Phys. Rev. A 32, 2010 (1985); 30, 2745 (1984)], certain general integral conditions and also an exact differential equation for the ...
, Baruah, , Zope, , Kshirsagar, , Pathak
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Positron-atom and positron-molecule collisions

Physics Reports, 1982
Abstract The scattering of positrons by atoms and molecules is reviewed. The recent development of monoenergetic slow positron beams and their applications to the measurement of cross sections for positrons interacting in various gases are discussed briefly.
A.S. Ghosh, N.C. Sil, P. Mandal
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Positron emission tomography

Radiation Physics and Chemistry (1977), 1984
One of the most exciting new techniques introduced in the last ten years is positron emission tomography (PET). PET provides quantitative, three-dimensional images for the study of specific biochemical and physiological processes in the human body.
Y L, Yamamoto   +4 more
openaire   +2 more sources

Positron Emission Tomography

Psychiatric Clinics of North America, 1986
PET is a unique tool for the direct in vivo evaluation of physiologic processes within discrete areas of the brain. Thus far, its application to the study of schizophrenia has served to confirm the subtleties of this illness. However, PET does promise to increase our knowledge of the neurochemical anatomy of the normal and abnormal mind with respect to
R M, Cohen, W E, Semple, M, Gross
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Cardiac Positron Tomography

Chest, 1983
Several approaches have become available for cardiac diagnosis, including two-dimensional echocardiography, pulsed Doppler echocardiography, gated bloodpool imaging, thallium 201 scintigraphy, and computer-assisted tomography ( T scanning). Each exhibits strengths and limitations dependent in part on the physical nature of the image forming variable ...
E M, Geltman, B E, Sobel
openaire   +2 more sources

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