Title Setting of local dose reference levels at Kaunas Republican hospital /
Translation of Title Diagnostinių atskaitos lygių nustatymas Respublikinėje Kauno ligoninėje.
Authors Jariomenko, Timūr
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Pages 47
Keywords [eng] radiography ; diagnostic reference levels ; thermoluminescent dosimetry ; dose area product ; entrance skin dose
Abstract [eng] Measurements of patient‘s exposure during X-ray examinations using TLD have been replaced by two other methods: dose evaluation using exposure parameters and dose recalculation from dose-area-product (DAP)-meter values. Standard patients (70±5 kg) are usually taken into account when setting dose reference levels and it is recommended to keep patients exposure not higher than the level of DRL. However, the majority of patients are not standard. Performed investigation which was conducted exploring applying both new methods for dose evaluation has shown that it is very important to include the data of non-standard patients when setting local dose reference levels. Analysis of biometric data of patients examined at the Republican Hospital of Kaunas has revealed that the average weight of patients was 82.9 kg, however, varied in the broad interval of weights. The comparison of dose data for standard and non-standard patients collected for in situ examined patients in 2 most common X-ray exams with 40 patients per exam has disclosed the importance for the inclusion of all patients when evaluating dose reference values Also, data from patients DICOM files for 8 most common X-ray exams at the hospital was investigated retrospectively. A sample of 200 patients per exam was analyzed. Calculated exposure doses for non- standard patients were similar to those evaluated in an in situ survey. The results of the investigation (DAP values) were compared to the national Diagnostic reference levels of Lithuania and a new local DRLs were proposed.
Dissertation Institution Kauno technologijos universitetas.
Type Master thesis
Language English
Publication date 2020