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QRS detection based on Stockwell transform
Kašík, Ondřej ; Kozumplík, Jiří (referee) ; Smital, Lukáš (advisor)
This bachelor´s thesis deals with the detection of QRS complexes in ECG record. The thesis provides a brief information related to the heart anatomy, generation of electrical signals in the heart, recording and description of the ECG record. In more detail, there is a description of the detection of QRS complexes by various methods and realization of a detector based on Stockwell transform, Shannon energy and adaptive thresholding. The evaluation process of the detection efficiency is also included. Sensitivity and positive prediction of the proposed detector on the complete MIT-BIH Arrhythmia database reached 99.80 % and 99.88 % respectively.
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Segmentation of ribs in thoracic CT scans
Kašík, Ondřej ; Kolář, Radim (referee) ; Jakubíček, Roman (advisor)
This thesis deals with design and implementation of an algorithm for segmentation of ribs from thoracic CT data. For the segmentation method of rib centerlines detection is chosen. The first step of this approach is to extract the centerlines of all the bones located in the scan. These centerlines are divided into short primitives, which are subsequently classified into couple of categories, depending on whether they represent the centerline of the rib. Subsequently, the centrelines of ribs are used as the seed points of the region growing algorithm in three-dimensional space, which realizes the final segmentation of the ribs. Within the work, a database of 10 CT scans was manually annotated, which was subsequently used to validate a performance of the proposed segmentation approach. The achieved success rate of primitive classification is 96,7 %, the success rate of rib segmentation (Dice coefficient) is 86,8 %.
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Changes of daily Sport through 1999-2006
Kasík, Ondřej ; Bednařík, Petr (advisor) ; Kraus, Jiří (referee)
The graduation theses "Changes of daily Sport through 1999-2006" treats of changes, which this only published sport newspapers in the Czech republic, had to go through after it became the part of the Ringier publishing company in 2002 (till 2002 the publisher of the magazine Sport was the Czechoslovakian sport company). Ringier publishing, which also publishes the tabloid newspapers Blesk, has completely changed the concept of the Sport, graphics and even the personal constitution of the editor's office. Zbyšek Pechr, the exvice general editor of the tabloid newspapers, has become the general editor. Since 2002 you can see elements of infotainment, which means transparency between the informational and entertainment functions. This graduation thesis also covers the position of the Sport compare to other competitors on the czech media market, the internet version of the Sport, the Sunday Sport papers and the Friday Magazine.
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Segmentation Of Ribs In Thoracic Ct Scans
Kašík, Ondřej
This paper deals with rib segmentation in thoracic CT data. For the segmentation method of rib centerlines detection is chosen. The first step of this approach is to extract the centerlines of all the bones located in the scan. These centerlines are divided into short primitives, which are subsequently classified into couple of categories, depending on whether they represent the centerline of the rib. More than 95% of all primitives are classified correctly. In the last step, the rib centrelines are used as the seed points of the region growing algorithm in three-dimensional space.
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Segmentation of ribs in thoracic CT scans
Kašík, Ondřej ; Kolář, Radim (referee) ; Jakubíček, Roman (advisor)
This thesis deals with design and implementation of an algorithm for segmentation of ribs from thoracic CT data. For the segmentation method of rib centerlines detection is chosen. The first step of this approach is to extract the centerlines of all the bones located in the scan. These centerlines are divided into short primitives, which are subsequently classified into couple of categories, depending on whether they represent the centerline of the rib. Subsequently, the centrelines of ribs are used as the seed points of the region growing algorithm in three-dimensional space, which realizes the final segmentation of the ribs. Within the work, a database of 10 CT scans was manually annotated, which was subsequently used to validate a performance of the proposed segmentation approach. The achieved success rate of primitive classification is 96,7 %, the success rate of rib segmentation (Dice coefficient) is 86,8 %.
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Qrs Detection Based On Stockwell Transform
Kašík, Ondřej
This paper deals with the detection of QRS complexes in the ECG record using the Stockwell transform, Shannon Energy and adaptive thresholding. The information about design of the QRS detector and its detection performance is also provided. Sensitivity of our detector achieves 99,80%, it's positive prediction takes value 98,86%.
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QRS detection based on Stockwell transform
Kašík, Ondřej ; Kozumplík, Jiří (referee) ; Smital, Lukáš (advisor)
This bachelor´s thesis deals with the detection of QRS complexes in ECG record. The thesis provides a brief information related to the heart anatomy, generation of electrical signals in the heart, recording and description of the ECG record. In more detail, there is a description of the detection of QRS complexes by various methods and realization of a detector based on Stockwell transform, Shannon energy and adaptive thresholding. The evaluation process of the detection efficiency is also included. Sensitivity and positive prediction of the proposed detector on the complete MIT-BIH Arrhythmia database reached 99.80 % and 99.88 % respectively.
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