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Physical bases of thermography for radiotherapists
LÁVIČKA, Šimon
There is currently no educational material for radiological assistants and students in this field to discuss the physical foundations of thermography. In particular, material which is appropriate to the presumed physical and mathematical knowledge required for the field of Radiologic Assistant and other related disciplines. Especially due to the fact that part of the scientific community sees in thermography a promising method for mammologii, rheumatology, orthopedics, angiology and dentistry. This motivation led to the elaboration of this bachelor thesis which set out these following goals: The selection of theory of knowledge transfer to the level of "Radiological Asssistant" and other related fields. The creation of an educational text that respects the chosen theory and reflects the blackbody radiation laws. The monitoring of current state of thermography knowledge in the addressees. There were two hypotheses formulated on the basis of an analysis of the current state and the setting of objectives: The application of theory to the curriculum process can create important components of a project curriculum for a given group of learners. The knowledge of the learners will have a theoretical distribution of the near- normal distribution in the area of physical fundamentals of thermography. As a convenient theory for transferring knowledge from science to the educational sphere has been proved to be the theory of the curricular process. Its applicability was accepted by the international scientific community as well see the impacted publication (Záškodný, 2012). Firstly, it was necessary to remind a generally known relationship of infrared radiation to thermography and than analyze the discovered theoretical physical backgrounds up to date, the most important for thermography also in relation to the radiation of the blackbody. There are also shown and described subsequent physical laws: Stefan-Boltzmann law, Wien displacement law, Rayleigh-Jeansons law and Planck´s radiation law, whereby it is especially necessary to emphasize the relationship of these laws to blackbody radiation whose temperature is between 0 K or -273,15 through the explanation of the emissivity parameter, which is a dimensionless quantity determining the heat emission capability. Its value must be entered in the thermal camera. Subsequently, a knowledge test was created on eighteen questions with a selection of four options, where only one was correct. Twenty-five radiological assistants active in their field at the age of twenty-three to fifty-three, with a length of practice from half a year to thirty-one years, were addressed. The methods of descriptive and mathematical statistics were used in the quantification of the addressees´ knowledge. All twenty-five tests were processed this way. Performing nonparametric testing of the empirical distribution of the scores obtained from these tests revealed that the second of the hypotheses set was not confirmed. The knowledge of the addressees was higher than the hypothetical assumption.
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