Bases fotocintilograficas para o estudo das encefalopatias de Canis familiaris L

Abstract

The objective of the present research was to contribute to the developement of encephalic scintilography on dogs using intravenous administered radiotracer. The study was conducted by administratring 20 mCu/99mTc pertechnetate into the radial vein of 14 normal dogs; the tracer was detected externally on the encephalus using a computerized gamma camera. The static pictures were easily obtained in 4 standard positions and presents good informations about encephalic morphology. The average times between intravenous introduction of the radiotracer and its reaching the carotid arteries and encephalus were: right carotid artery -12.28 sec; left carotid artery - 12.42 sec; right cerebral hemisphere - 18.92 sec; left cerebral hemisphere - 20.21 sec. The mean peak of radiactive counts in right carotid artery was 67.50 poulses; in left carotid artery, was 57.57 poulses; in right cerebral hemisphere was 191.85 poulses; left cerebral hemisphere was 181.85 poulses. The average time between tracer administration and peak ocurrence was on the right carotid artery 32.71 sec; on the left carotid artery 32.64 sec; on the right cerebral hemisphere 36.50 sec; on the left cerebral hemisphere 37.07 sec. Because of its innocous and noninvasive nature, the fotocintilography can be used to evaluate patients suffering encephalic disturbances.