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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 44 (1940), S. 1113-1126 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1619-7089
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The first commercial version of the Massachusetts General Hospital (MGH) positron camera was used to image the relative distributions of 13N (T 1/2=9.96min) in the human heart, pancreas, and liver after intravenous administration of [13N]-l-glutamate. The instrument was operated in two imaging modes. Conventional 2-dimensional (2-D) focal-plane images showed high concentrations of 13N in the heart and pancreas, and lower levels in the liver. Five PET tomographic transverse section (3-D) images were made through the heart and three through the pancreas. Our results suggest that further studies designed to gain an improved understanding of the biochemistry of [13N]-l-glutamate aided by PET imaging, especially with newer instrumentation, are worthy of further investigation.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nuclear medicine 9 (1984), S. 272-277 
    ISSN: 1619-7089
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Potassium 38 emits a 2.68-MeV (max) positron, followed promptly by a 2.17-MeV γ-ray in 99.8% of its disintegrations. A positron is emitted also, followed by a 3.94-MeV γ-ray, in 0.2% of the decays. The pairs of 511-keV PET±γ-quanta, which are emitted at 180±0.3° to each other, are in true coincidence with the prompt γ-rays emitted by the daughter nucleus, within the resolving time of PET instrumentation. Studies made with phantoms by means of a commercial version of the MGH PET camera demonstrated that quantitatively satisfactory images are derived, despite the presence of the prompt γ-rays. Two-dimensional (2-D) focal-plane images reveal high uptake of38K promptly in the myocardium of dogs, under barbiturate sedation. Third-dimensional (3-D) transverse section PET tomographic images, through four 1.0-cm-thick heart “slices” orthogonal to the plane of the 2-D images and with 1.4-cm sequential spacing, show38K uptake to be concentrated especially highly in the left ventricle, as expected. Peak levels of activity were observed over the myocardium at 12 s after intravenous bolus injection of ionic38K. Dynamic mode 2-D images were taken at intervals as short as 0.5 s and extending to 1 h.
    Type of Medium: Electronic Resource
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