Preliminary report on placental scanning by the use of human serum albumin labelled with 99th TC

No Abstract

Calibration and Measurement of Potassium-40 with a Whole-Body Counter

Total potassium content in the human body may be obtained by measuring naturally occurring radioactive potassium-40, in a whole-body counter. The basic problem in calibrating the whole-body counter is discussed, as well as a phantom that is used to solve this problem. The normal potassium levels for men and for women were determined. Two additional parameters - lean body mass and total body water - derived from the potassium content, were also calculated

Digitale Dataverwerking Gedurende Radio-isotoopflikkergrafie

The features of an on-line image data processing system for nuclear medicine are described. The uses of the system for the processing and evaluation of images, lung function determinations and cardiac studies are mentioned

The Victoria west: Earliest prepared core technology in the acheulean at canteen kopje and implications for the cognitive evolution of early hominids

Prepared core technology illustrates in-depth planning and the presence of a mental template during the core reduction process. This technology is, therefore, a significant indicator in studying the evolution of abstract thought and the cognitive abilities of hominids. Here, we report on Victoria West cores excavated from the Canteen Kopje site in central South Africa, with a preliminary age estimate of approximately 1Ma (million years ago) for these cores. Technological analysis shows that the VictoriaWest cores bear similarities to the ‘Volumetric Concept’ as defined for the Levallois, a popular and widely distributed prepared core technology from at least 200 ka (thousand years ago). Although these similarities are present, several notable differences also occur that make the Victoria West a unique and distinctive prepared core technology; these are: elongated and convergent core shapes, consistent blow directions for flake removal, a predominance of large side-struck flakes, and the use of these flakes to make Acheulean large cutting tools. This innovative core reduction strategy at Canteen Kopje extends the roots of prepared core technology to the latter part of the Early Acheulean and clearly demonstrates an increase in the cognitive abilities and complexities of hominids in this time period.EM201

Kwantitatiewe Radio-isotoop Kardiografie met die Sintillasie-kamera

Methods for obtainiR9 various cardiac parameters, using radio-isotopes and the scintillation camera, have improved tremendously during recent· years. These investigations offer a simplified screening test for visual interpretation. By the use of numerical techniques, quantitative information can be obtained, making investigations more sensitive. Left-to-right shunts, cardiac output, left ventricular ejection fraction and other parameters can be quantitated

Physical Aspects of 99mTc, 87mSr and 18F for Bone Scintigraphy

The physical properties of 99mTc, 87mSr and 18F as bone scanning agents for a scintillation camera fitted with a medium energy diverging collimator, were determined. This was done by incorporating the plane source sensitivity, the modulation transfer function and the figure of merit. From the results it is clear that 99mTc is superior to 87mSr and 18F

How does the BFKL pomeron couple to quarks?

We investigate the coupling of the BFKL-Pomeron to quarks and to colorless states. Special emphasis is given to the effective quark-quark scattering amplitude of Mueller and Tang