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Analysis of difference between HRV parameters gained from PP and RR intervals
Svobodová, Sabina ; Janoušek, Oto (referee) ; Milek, Jakub (advisor)
This bachelor thesis aims to solve problems of ECG signals, respectively detection of QRS complex and P wave, and subsequent analysis of heart rate variability. The first part is focused on literary research. It deals with the heart anatomy, electrocardiography and more detailed description of individual waves, as well as with the pre-processing of ECG signal, QRS complex detection and P wave detection. The last theoretical part describes the analysis of heart rate variability. In the practical part detection of QRS complex, P wave and subsequent analysis of heart rate variability is programmed in MATLAB. Finally, statistical evaluation is performed in STATISTICA.
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Blood vessel segmentation in high resolution retinal images
Svobodová, Sabina ; Odstrčilík, Jan (referee) ; Valterová, Eva (advisor)
This thesis focuses on implementation of an algorithm for retinal vessel segmentation in high resolution retinal images.A neural network with two hidden layers was used as the method. A total of 7 features were obtained from matched filtering based on vessel thickness, texture analysis and individual pixels brightness. Within the thesis, the whole database was manually annotated for the implementation of the algorithm and the results. The achieved mean sensitivity reached 80%, specificity 70% and Dice coefficient is 59%.
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Nutrition of infants and toddlers
SVOBODOVÁ, Sabina
The aim of my bachelor thesis is to theoretically summarize nutrition of infants and toddlers, and to compare natural infant nutrition and infant formula. Furthermore I want to determine the effect of natural infant nutrition and infant formula on children, the effect of breastfeeding until the end of the 6th month of infancy and the effect of breastfeeding for more than 6 months, and also to map the diet of breastfeeding mothers. I asked four research questions. What is the effect of replacing natural infant nutrition with infant formula on the baby? How does the length of breastfeeding affect a baby? How are mothers informed about their nutrition while breastfeeding and children nutrition? What kind of comlementary feeding for children do mothers choose? The research was conducted by 10 mothers and their children using questionnaires, case reports and interviews. The questionnaire contains 21 questions. To collect the answers I used both printed forms and data collection using Survio.cz. Afterwards I asked the interviewees to fill in their children's five-day diets. I obtained the resulting values of the diet using the Nutriservis profi application. The result of data collecting from the questionnaire was that nine of ten children were toddlers. Some of the contacted mothers, who had both infants and toddlers, answered the questions based on their older child diet. None of the mothers using infant nutrition mentioned that this nutrition had a negative effect on their babies. The values obtained from the diets resulted to be in line with the recommendations concerning infant and toddler nutrition.
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Blood vessel segmentation in high resolution retinal images
Svobodová, Sabina ; Odstrčilík, Jan (referee) ; Valterová, Eva (advisor)
This thesis focuses on implementation of an algorithm for retinal vessel segmentation in high resolution retinal images.A neural network with two hidden layers was used as the method. A total of 7 features were obtained from matched filtering based on vessel thickness, texture analysis and individual pixels brightness. Within the thesis, the whole database was manually annotated for the implementation of the algorithm and the results. The achieved mean sensitivity reached 80%, specificity 70% and Dice coefficient is 59%.
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Analysis of difference between HRV parameters gained from PP and RR intervals
Svobodová, Sabina ; Janoušek, Oto (referee) ; Milek, Jakub (advisor)
This bachelor thesis aims to solve problems of ECG signals, respectively detection of QRS complex and P wave, and subsequent analysis of heart rate variability. The first part is focused on literary research. It deals with the heart anatomy, electrocardiography and more detailed description of individual waves, as well as with the pre-processing of ECG signal, QRS complex detection and P wave detection. The last theoretical part describes the analysis of heart rate variability. In the practical part detection of QRS complex, P wave and subsequent analysis of heart rate variability is programmed in MATLAB. Finally, statistical evaluation is performed in STATISTICA.
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