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High resolution computed tomography - its role and position in radiodiagnostics
CHYLÍKOVÁ, Renáta
In the introduction to my bachelor´s thesis, I have described the historical background of HRCT, its origins, and evolution. The historical part includes information about the development of CT equipment and the principles of diagnostics using the instruments that preceded HRCT. In the following part, I have described the principle of how HRCT works and the conditions that are needed for HRCT examination. I focused on lung examination and partly also on the examination of temporal bone. The objective of my thesis is to determine the frequency of CT and HRCT application, for the purposes of which I compared two leasing hospitals in the South Bohemian region. I issued from the hypothesis of a higher frequency of HRCT use. In my bachelor´s work I used foreign literature and sources and also the method of comparing data from two hospitals. The preferred method was the quantitative one, used for numerical statistics in the theoretical part; for the practical part I used the mentioned comparison of the number of examinations performed at two hospitals in South Bohemia. When confronting the two hospitals, a significantly higher frequency of HRCT use was found in Nemocnice Tábor a.s. This fact is explained by the use of Aquilion 16, which is a lower ? quality appliance, and Aquilion 64 in České Budějovice, as well as by the monitoring of patients with fibrosing processes (so ? called cordarone lung, etc.), and patients with unclear small lesions appearing on summing images when only HRCT examination was performed. HRCT is also performed as a part of routine examination of the lungs and mediastinum if the indication requires it, while check ? up examinations run only under the HRCT algorithm. In conclusion it can be stated that the difference between the examinations in hospital České Budějovice a.s. and Nemocnice Tábor a.s. is based on the difference between their equipment and also the slightly different approach to small lesions in the pulmonary parenchyma.The hypothesis that the HRCT examination is used more frequently than the common CT examination of the lungs and mediastinum was not confirmed, which results from the fact that the number od patients needing the examination of just small or larger changes in the pulmonary parenchyma is substantially lower than the number of patients with indicated classical examination of the lungs and mediastinum.
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