A multimedia medical communication link between a radiology department and an emergency department.

The most critical aspect of a radiologist's work is communicating his findings to the attending physician responsible for the patient's care. This is also the part of the process that is least well organized and the most subject to failure. At the University of Ottawa Medical Communications Research Centre we are investigating technical means to improving communications between radiologists and attending physicians.

Context-dependent enhancements for radiological images.

Many techniques have been proposed to enhance radiographic images and each of them may be optimal depending upon the circumstances. However, the problem confronting the radiologist or the physician is which enhancement to use and how to select the parameters when a specific feature is to be emphasized. At the University of Ottawa, our research work is oriented towards automatic context-dependent enhancements.

Failure to obtain functional equivalence between dopamine receptor blockade and extinction: evidence supporting a sensory-motor conditioning hypothesis.

The effects of pimozide were tested in a discrete trial paradigm. Following 8 days of continuous reinforcement training with a retractable bar, subjects were divided into 3 groups: Vehicle-Extinction; Pimozide-Extinction and Pimozide-Reinforcement. Pimozide rats received 1 mg/kg of drug 4 hours prior to test.

Ethanol-Metrecal diets: I. effects of different levels of ethanol-derived kilocalories on consumption of diet, body weight and grams of ethanol ingested.

Three experiments investigated the relationship between ethanol consumption and the percentage of ethanol-derived kilocalories contained in liquid diets. Rats were chronically maintained on diets where different concentrations of ethanol (10%, 12%, 14%) were added to Metrecal so that 41%, 49% and 57% of all kilocalories consumed were derived from ethanol. The ethanol-Metrecal diet served as the sole source of calories.