Results 271 to 280 of about 271,559 (315)

Positron emission tomography of the brain

Computerized Medical Imaging and Graphics, 1989
Positron emission tomography (PET) is a technique of transverse tomographic imaging in which detection of two photons emitted from the annihilation of a positron and an electron is used to reconstruct the distribution of a positron emitting isotope within an object.
D G, Jamieson, J H, Greenberg
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Instrumentation for positron emission tomography

Annals of Neurology, 1984
Positron 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, S E, Derenzo, R H, Huesman   +2 more
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Positron Emission Tomography and Profiling

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Jong, de, A.M., Hensen, E.J.M., Santen, van, R.A.   +2 more
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Positron Emission Tomography/Computed Tomography

Seminars in Nuclear Medicine, 2008
Accurate 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 radiochemistry

Neuroimaging Clinics of North America, 2003
Factors that place constraints on radio-chemists who are seeking to design and develop radiopharmaceuticals for PET imaging studies include the short half-lives of 11C and 18F, minimum radiochemical yield and specific activity requirements, and high radiation fields that are associated with multi-Curie quantities of PET radionuclides.
N Scott, Mason, Chester A, Mathis
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Cardiac positron emission tomography

Seminars in Nuclear Medicine, 1998
Positron 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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Instrumentation in positron emission tomography

Neuroimaging Clinics of North America, 2003
The past 40 years have seen PET scanning evolve from a tool that was used predominantly for research to a valued clinical, imaging modality. Current PET scanners must perform high quality, whole-body, as well as brain, PET. There are several levels of PET devices that range from the dedicated, high-end scanners down to the hybrid PET-SPECT systems that
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Positron Emission Tomography in Neuropsychiatry

Investigative Radiology, 1991
Positron 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 in oncology

Clinical Physiology, 1994
Summary. The particular advantages of positron emission tomography (PET) technique are that it has higher sensitivity, higher resolution, and a higher quality of image than that found in conventional nuclear medicine. The possibility of quantification and the wide range of useful tracers have raised expectations of this new method.
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Positron Emission Tomography for Neurologists

Neurologic Clinics, 2009
This short review focuses on practical, present day, clinical application of FDG PET, a technology available to practicing neurologists for managing their patients. Indications in the disease states of dementia, neuro-oncology, epilepsy, parkinsonism, and other less common settings are reviewed.
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