[Statistical indices of 201Tl distribution in the myocardium]. / Statisticheskie pokazateli raspredeleniia 201Tl v miokarde.

A study was made of the diagnostic potentialities of a histogram analysis of scintigraphic count distribution on myocardium scans using 201Tl in 9 patients with dilated cardiomyopathy, 12 patients with coronary heart disease and 6 patients with primary pulmonary hypertension. Scans were recorded 10 min., 4 and 24 h after a single administration of 201Tl at rest in the front-forward, 45 degrees left forward oblique and left lateral projections. The heart area on a scan was marked by hand. Count distribution was represented by an intensity histogram. An array of 243 scans was processed independently by 2 operators of different professional skill. A man-machine classification procedure with algorithm teaching was implemented. The author showed a possibility of group distinction by scintillation count distribution in the heart area on myocardium scans using 201Tl, the distinguishing information being within the interval of 41-80% of maximum intensity in this area. Automatic marking of the heart area on a scan was found necessary to have an entirely automated system for distinguishing groups of examinees.

[Qualitative-quantitative analysis of changes in rat caudate nucleus neurons during postnatal ontogenesis]. / Kachestvenno-kolichestvennyi analiz izmenenii neironov khvostatogo iadra krys v postnatal'nom ontogeneze.

Changes of the neurons of the caudate nucleus were analyzed in rats of different age (newborn, 7-, 14-, and 30-day-old) by qualitative and quantitative methods. Complication of the structural components of the nerve cells during the early postnatal ontogenesis was shown. The process of the neuron maturation proved to be most intensive during two postnatal weeks and was practically complete by the 30th day of the postnatal period. The results suggest that at this period of ontogenesis the caudate nucleus takes part in the integral activity of the brain.