ABSTRACT
Temporomandibular joint morphology and function can be evaluated by panoramic zonography. Thermoluminescent dosimetry was applied to evaluate the radiation dose to predetermined sites on a phantom eye, thyroid, pituitary, and parotid, and the dose distribution on the skin of the head and neck when the TMJ program of the Zonarc panoramic x-ray unit was used. Findings are discussed with reference to similar radiographic techniques.
Subject(s)
Temporomandibular Joint/diagnostic imaging , Humans , Radiation Dosage , Tomography, X-Ray/instrumentationABSTRACT
The conclusions are put forward that are adopted by a discussion group preparing the framework for a limitation policy of the radon problem in Belgium. Existing and future situations are treated in a coherent policy that is adequate for practical implementation. An action level is defined, together with a hierachy of levels for new constructions. The decision logic for the acceptance of building materials is explained.
Subject(s)
Environmental Exposure , Radiation Protection/standards , Radiation , Belgium , Construction Materials/standards , Humans , Quality Control , Radiation Dosage , Radiation Monitoring , Radon/analysisABSTRACT
A method to analyse and quantify the locomotory activity of a soil dwelling organisms is described. It is found that the locomotory activity of an isolated individual of Hypogastrura viatica, subject to restlessness, decreases in time, resulting in a constant basic activity. The effect of clustering on an individual results in a constant decrease of its activity, independently of the cluster size and in a decrease of the influence of restlessness.
