| Summary: | Topic: Optimization of exposure values in computed tomography MUDr. Jiří Bejček, Department of Imaging Methods, FH Pilsen Introduction: Stroke is one of the most frequent diseases in the human population, the second most frequent cause of death in economically developed countries. Early diagnosis and rapid treatment play a key role. Computed tomography can be used to diagnose stroke and select optimal therapy for the patient. However, rising CT scans increase the radiation exposure of the population. Aim: The aim of this work was to analyze the stroke protocol used in the Department of Imaging Methods in Pilsen, which is used in the diagnosis of acute cerebral ischemia. In addition, the aim was to design a modification of the protocol in order to reduce the radiation exposure, maintain the diagnostic quality of the image for evaluation and verify the feasibility in daily routine. Methods: The circulation times of the original (test) protocol were analyzed retrospectively. Based on this analysis, a shortened protocol was set according to test bolus performed in CT angiography. 134 patients were examined with this protocol. Subsequently, a reduction of the voltage to 70 kV was performed and 108 patients were examined. Further protocol adjustments were made according to the width of test bolus curve. 38...
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