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Application for Recognition of Human Eye Retina
Drozd, Radek ; Hájek, Josef (referee) ; Drahanský, Martin (advisor)
The blood vessels layout in a human eye retina is unique for every person in the world, so it is one of important biometric characteristics. Processing of colour retina image may be a part of an intended biometric system. There is an algorithm for automatic blood vessels detection, optic disc and macula localisation, finding of bifurcation points and saving those as a biometric template presented in this bachelor's thesis. C++ programming language and OpenCV library were used for implementation. The application was tested on a set of colour retina images, taken by fundus camera. The final application is supposed to run on a digital signal processor, developed by Texas Instruments. The thesis gives the introduction into biometrics, signal processing and human eye anatomy.
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Blood vessel segmentation in fundus images using mathematical morphology
Stonawski, Stanislav ; Jan, Jiří (referee) ; Odstrčilík, Jan (advisor)
Segmentation of retinal blood vessel is an important step in the fundus image analysis. The resulting image can be used to diagnose ophthalmic or cardiovascular diseases. The aim of this thesis is to search for possibilities of high resolution eye fundus image processing while using mathematical morphology methods. This should lead to the creation of an algorithm capable of blood vessel segmentation. The thesis provides information on fundus camera, image, blood vessel properties and mathematical morphology filtering methods. The created algorithms and the proposed method based on them are presented, including their performance analysis based on the HRF database processing.
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Influence of mechanical properties of vascular grafts on their clinical applications
Chomič, Dimitrij ; Polzer, Stanislav (referee) ; Burša, Jiří (advisor)
The theme of my bachelor’s thesis is the vascular replacement. I write about the types of blood vessels, their anatomy, physiology, pathology and mechanical characteristics. My thesis contains a part about the types of vascular replacements, I define their mechanical characteristics and I describe how the vascular replacement used in medicine. I study the artificial vascular replacement preferentially. To illustrate the application of the moment theory of cylindrical shells (Course in PP II), I solve the extreme stresses in the connection of a replacement with a vessel having mutually different geometrical and material parameters. The artery and the replacement were under pressure of 16 kPa corresponding to the systolic blood pressure.
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Experiments with Images of Eye Retina
Floryček, Jan ; Orság, Filip (referee) ; Fiala, Jiří (advisor)
The layout of blood vessels in human eye retina is one of the important physiological biometric characteristics of every individual. The processing of color retinal images and extraction of the blood vessel structure is an important phase in diagnostics of many eye diseases as well as in gathering biometric data. An automatic method for image processing, extracting the blood vessel structure and saving a template for usage in a biometric system will be described in this bachelor thesis. The method was developed and tested on actual retinal images acquired by digital fundus camera and it was implemented in language C++ with the use of OpenCV library. This thesis also contains a brief introduction to biometrics, computer graphics and medicine.
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Blood vessel segmentation in fundus images using mathematical morphology
Stonawski, Stanislav ; Jan, Jiří (referee) ; Odstrčilík, Jan (advisor)
Segmentation of retinal blood vessel is an important step in the fundus image analysis. The resulting image can be used to diagnose ophthalmic or cardiovascular diseases. The aim of this thesis is to search for possibilities of high resolution eye fundus image processing while using mathematical morphology methods. This should lead to the creation of an algorithm capable of blood vessel segmentation. The thesis provides information on fundus camera, image, blood vessel properties and mathematical morphology filtering methods. The created algorithms and the proposed method based on them are presented, including their performance analysis based on the HRF database processing.
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Application for Recognition of Human Eye Retina
Drozd, Radek ; Hájek, Josef (referee) ; Drahanský, Martin (advisor)
The blood vessels layout in a human eye retina is unique for every person in the world, so it is one of important biometric characteristics. Processing of colour retina image may be a part of an intended biometric system. There is an algorithm for automatic blood vessels detection, optic disc and macula localisation, finding of bifurcation points and saving those as a biometric template presented in this bachelor's thesis. C++ programming language and OpenCV library were used for implementation. The application was tested on a set of colour retina images, taken by fundus camera. The final application is supposed to run on a digital signal processor, developed by Texas Instruments. The thesis gives the introduction into biometrics, signal processing and human eye anatomy.
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Experiments with Images of Eye Retina
Floryček, Jan ; Orság, Filip (referee) ; Fiala, Jiří (advisor)
The layout of blood vessels in human eye retina is one of the important physiological biometric characteristics of every individual. The processing of color retinal images and extraction of the blood vessel structure is an important phase in diagnostics of many eye diseases as well as in gathering biometric data. An automatic method for image processing, extracting the blood vessel structure and saving a template for usage in a biometric system will be described in this bachelor thesis. The method was developed and tested on actual retinal images acquired by digital fundus camera and it was implemented in language C++ with the use of OpenCV library. This thesis also contains a brief introduction to biometrics, computer graphics and medicine.
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Influence of mechanical properties of vascular grafts on their clinical applications
Chomič, Dimitrij ; Polzer, Stanislav (referee) ; Burša, Jiří (advisor)
The theme of my bachelor’s thesis is the vascular replacement. I write about the types of blood vessels, their anatomy, physiology, pathology and mechanical characteristics. My thesis contains a part about the types of vascular replacements, I define their mechanical characteristics and I describe how the vascular replacement used in medicine. I study the artificial vascular replacement preferentially. To illustrate the application of the moment theory of cylindrical shells (Course in PP II), I solve the extreme stresses in the connection of a replacement with a vessel having mutually different geometrical and material parameters. The artery and the replacement were under pressure of 16 kPa corresponding to the systolic blood pressure.
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CT angiography vs. ultrasound imaging of the bloodstream - efectivity, limitation and impact on patients' health.
ADAMEC, Jaroslav
The subject of the BA thesis is "CT angiography vs. ultrasound imaging of the bloodstream - efectivity, limitation and impact on patients' health". Examination of blood vessels by computed tomography - CT angiography, using modern equipment and technological development, takes over the diagnostics of vascular diseases from digital subtraction angiography primarily due to the speed of the examination and the lesser invasiveness with regard to the patient. The second method treated in this thesis is ultrasonography. Which of these imaging methods yields better diagnostic information on blood vessel pathologies? Which entails fewer risks to the patient and which is more limited? I have tried to find the answers to these questions in this BA thesis. In this thesis I set out to find which of the two imaging modalities is more suitable for examining vascular diseases. A further aim of the thesis is to introduce and compare various examination methods of computed tomography and ultrasonography. The hypothesis of the BA thesis states: "Ultrasonography is a more suitable method for the examination of the blood vessel tree - it is a method which provides good diagnostic information and at the same time entails a lower risk to the patient than does computed tomography". The introductory part of the thesis is devoted to the anatomy of the blood vessel tree. It describes main blood vessels, veins, their construction and branches. This part also introduces the technological equipment which is used for the examination of the blood vessel tree - computed tomography machine, ultrasonography machine - and their historical development. The basic physical principles of these devices, their methods of imaging and general methods of the examination of the blood vessel tree are also described in this chapter. In the case of computed tomography it is CT angiography, and in ultrasonography it is Doppler examination. The chapter also briefly deals with the advantages and disadvantages of these methods and with the contrast media which are applied in connection with the examination of the vascular system. I have studied all available specialized literature and web sites related to the subject for the purpose of writing this BA thesis. Data from the Institute of Health Information and Statistics were used for the analysis of the technological equipment. Data from the information network of the R+S Benešov a.s. hospital were used for the analysis of the number of blood vessel examinations carried out by ultrasonography and computed tomography. Examination methods of the vascular system performed by computed tomography and ultrasonography have been summarized in the result. Furthermore, both modalities are compared in this chapter with regard to their utilization rate, limitations and risks. The chapter also includes an analysis of the data on the computed tomography and ultrasonography technology in the Czech Republic and on the number of blood vessel examinations carried out by computed tomography and ultrasonography. In the chapter "Discussion" I present my own opinion on the given matter. It also includes a reflection on the issue of indicating examinations on computed tomography. In the conclusion of the thesis, examination methods of the vascular system by computed tomography and ultrasonography are assessed, and established findings on the studied matter are summed up. After studying all available specialized literature I have found that it is impossible to determine which of the two imaging methods is more suitable for the examination of the blood vessel tree because each of them has its specific advantages and disadvantages. The two modalities are thus not opposed to each other in the decision making which method should be indicated; on the contrary, the two methods should be used in close collaboration. The hypothesis of the thesis therefore has not been proved.
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