Results 161 to 170 of about 1,713,772 (211)
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Brain Topography, 1992
Positron emission tomography (PET) allows for the absolute measurement of regional tissue physiological, biochemical and pharmacological processes. This ability is a consequence of the nature of positron emission and the type of tracers which can be labelled with positron emitting radionuclides. The spatial resolution of state of the art scanners is in
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Positron emission tomography (PET) allows for the absolute measurement of regional tissue physiological, biochemical and pharmacological processes. This ability is a consequence of the nature of positron emission and the type of tracers which can be labelled with positron emitting radionuclides. The spatial resolution of state of the art scanners is in
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Positron emission tomography in the lung
Journal of Thoracic Imaging, 1985Positron emission tomography using the ECAT II scanner to image and measure regional lung function is outlined. The combined use of transmission and emission imaging provides quantitative information about regional lung structure (density, extravascular density, and vascular volume) and function (ventilation, perfusion, ventilation-perfusion ratios ...
J M, Hughes +3 more
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Instrumentation for positron emission tomography
Annals of Neurology, 1984Positron emission tomography with a spatial resolution of 2 mm full width at half maximum for quantitation in regions of interest 4 mm in diameter will become possible with the development of detectors that achieve ultrahigh resolution. Improved resolution will be possible using solid-state photodetectors for crystal identification or photomultiplier ...
T F, Budinger +2 more
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Positron Emission Tomography and Epilepsy
Molecular Imaging & Biology, 2002This review examines the current role of positron emission tomography (PET) in the investigation and management of patients with epilepsy.A literature review utilizing MEDLINE(R) and other sources was undertaken. For the comparison of the accuracy of PET with magnetic resonance imaging (MRI) for seizure focus localization, only publications since 1994 ...
Rey, Casse +4 more
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Positron Emission Tomography of the Brain
PET Clinics, 2006Positron emission tomography (PTE) is a technique that allows imaging of the temporal and spatial distribution of positron-emitting radionuclides. The purpose of this article is to outline the current clinical use for PET imaging in the brain and other radiopharmaceutical used for assessing various physiologic parameters pertaining to tumor metabolism.
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Positron emission tomography (PET)
Journal of Medical Systems, 1982Among emerging medical diagnostic imaging modalities, positron emission tomography, often abbreviated to its acronym “PET”, belongs in the category of nuclear medicine. Indeed, the image forming variable in PET is the distribution in the structure under study of a radionuclide administered systemically in the form of a selected radiopharmaceutical ...
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Positron Emission Tomography in Neuropsychiatry
Investigative Radiology, 1991Positron emission tomography (PET) allows high-resolution, three-dimensional evaluation of regional brain metabolic activity and neurotransmitter function. This imaging technique has been applied increasingly in psychiatric research and may yield new information regarding the neural mechanisms of several mental disorders. This article is an overview of
M E, Faulstich, D C, Sullivan
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Positron Emission Tomography/Computed Tomography
Seminars in Nuclear Medicine, 2008Accurate anatomical localization of functional abnormalities obtained with the use of positron emission tomography (PET) is known to be problematic. Although tracers such as (18)F-fluorodeoxyglucose ((18)F-FDG) visualize certain normal anatomical structures, the spatial resolution is generally inadequate for accurate anatomic localization of pathology.
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Positron Emission Tomography in Cardiology
Radiologic Clinics of North America, 1985This article reviews the basis of PET imaging and current applications to cardiology. Included is a discussion of physical principles, detectors, quantitative estimation of regional radioactivity concentrations, radiopharmaceuticals, and application to flow and metabolism measurements in the myocardium.
J A, Correia, N M, Alpert
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Cardiac positron emission tomography
Seminars in Nuclear Medicine, 1998Positron emission tomography (PET) is an intrinsically quantitative tool that provides a unique and unparalleled approach for clinicians and researchers to interrogate the heart noninvasively. The ability to label substances of physiological interest with positron-emitting radioisotopes has permitted insight into normal blood flow and metabolism and ...
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