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Reaction time analysis on the basis of measurements in regular road traffic
Bilík, Tomáš ; Bucsuházy, Kateřina (referee) ; Belák, Michal (advisor)
This diploma thesis deals with driver’s reaction time in regular road traffic. The theoretical part of this work focuses on reaction time, such as various definitions, structuring of reaction time, methods of measuring or publications made by other authors. The practical part of this diploma thesis includes proposal and realization of experiment, based on analysis of the current state by the author of this diploma thesis, which focuses on driver’s reaction time in regular road traffic (various traffic situations). At the end, the practical part presents the results evaluation based on various traffic situations or headway.
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Reaction time analysis on the basis of measurements in regular road traffic
Bilík, Tomáš ; Bucsuházy, Kateřina (referee) ; Belák, Michal (advisor)
This diploma thesis deals with driver’s reaction time in regular road traffic. The theoretical part of this work focuses on reaction time, such as various definitions, structuring of reaction time, methods of measuring or publications made by other authors. The practical part of this diploma thesis includes proposal and realization of experiment, based on analysis of the current state by the author of this diploma thesis, which focuses on driver’s reaction time in regular road traffic (various traffic situations). At the end, the practical part presents the results evaluation based on various traffic situations or headway.
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Influence of the time interval from the radiopharmaceutical administration on the bone / background activity ratio in the bone scintigraphy
ZAHOŘOVÁ, Tereza
Influence of the time interval from the application of radiopharmaceutical on the activity ratio of bone/backround during the skeletal scintigraphy. The presented thesis aims to demonstrate the effect of the selected time interval from the application of radiopharmaceutical until the start of whole body skeletal scintigraphy on the quality of examination of patients at the department of nuclear medicine at the Clinic of imaging methods in FN Pilsen. The ratio between the background and bone activity of patients will vary with the length of the interval between the application of radiopharmaceuticals and the beginning of imaging. We expect that with prolonging of the time interval the ratio between the background and bone activity will increase, which means a higher quality of your imaging in practise. The hypothesis of this thesis expects a differentiation of ratio between the background and bone activity depending on the time of initiating whole body scintigraphy from the time of application of radiopharmaceuticals. To determine the ratio value a reference file of males aged 25-65 years (year of birth from 1951 to 1991, the year of examination from 2013 to 2016), weighing 65-95 kg was created, where scintigraphy does not show pathology in the examined area of the skeleton or in the soft tissues on the left thigh. These patients were divided into two groups according to the time intervals between the application and the beginning of the whole body skeletal scintigraphy. The first group consists of 30 patients who were examined less than 120 minutes after the application of the radiopharmaceutical. The second group consists of 30 patients who were examined more than 120 minutes after the application of the radiopharmaceutical. Using the ROI technique, values from the areas L5, right femur and soft tissue structures on the left thigh are obtained. These values are then used to calculate the time intervals on the activity ratio of bone/backround and verify the hypothesis, which assumes that the ratio values between the above mentioned groups will be different. This difference should prove that a longer time interval between the application of the radiopharmaceutical and the beginning of scintigraphy will bring a higher quality of scintigraphic imaging. This qualitative factor will be beneficial both for patients and their physicians who have to describe these scintigrams.
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