Visualization and detection-localization on computed tomographic images.

These studies investigated observers' ability to detect and locate highly visible liver lesions on computed tomographic (CT) images, manipulating both the lesion's location and polarity (brighter or darker than liver background). Visibility of a lesion is not sufficient to guarantee accurate localization. With clinical images, possible confusions between a lesion and coexisting normal structures (like blood vessels) is a serious constraint on observer performance.

Fish consumption and cardiovascular mortality in Canada: an inter-regional comparison.

There is growing evidence from both experimental and epidemiologic studies to suggest that regular fish consumption reduces the risk of cardiovascular disease in humans. However, a crude analysis of Canadian descriptive data does not support this hypothesis. Age-adjusted mortality from ischemic heart disease and cerebrovascular disease is actually higher in the Atlantic Provinces than in the Prairies where fish consumption is much lower. Possible reasons for this, including the importance of the type of fish consumed, and the effects of methods of preparation are discussed.

[Differentiation of mycobacteria by the Jones-Mote reaction (author's transl)]. / Differenzierung von Mykobakterien mit der Jones-Mote-Reaktion

The specificity of the Jones-Mote reaction to the mycobacterial species was investigated in mycobacteria-free guinea pigs. To the sensitization and the sensitine production the following type strains (Trudeau Institute Saranac Lake) were used: M. avium, M. borstelense, M.chelonei, M. flavescens, M. fortuitum, M. gastri, M. gordonae, M.kansaii, M. marinum, M nonchromogenicum, M. phlei, M. scrofulaceum, M. smegmatis, M. terrae, M. triviale and M. bovis strain Vallee as well as M. intracellulare serotyp Davis ATCC 23435. Eight days after intracutaneous sensitization with 0,2 mg of bacterial mass (wett weight) in Al(OH)3 as adjuvans the groups of 10 animals for each species were tested intracutaneously with all 18 sensitins in a concentration of 5 mug. The animals reacted positive with the homologous sensitin only; (tab. 1) a cross-reaction was stated between M. avium and M. intracellulare (closely related) and between M. borstelense and M. chelonei (the same species). The homogeneity of the Jones-Mote reaction in some rapidly growing Mycobacteria was investigated with 11 strains of M. diernhoferi, 10 strains of M. smegmatis, M. phlei, M. fortuitum and 3 strains of M. borstelense. The positive reaction was stated with species-specific sensitin only. It should be possible to identify the primocultures using mycobacteria-free guinea pigs and suitable sensitins.