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Measurement and analysis of the blood flow in peripheral vessels by ultrasound Doppler methods
Lepš, Milan ; Sedlář, Martin (referee) ; Vlk, Daniel (advisor)
Nowadays, the Doppler ultrasonography is an essential part in medicine. With it, we can observe acoustic showoff some tissue associated with Doppler measurement of blood flow parameters. It is still using Doppler devices with a continuous signal which are although structurally and technically simpler, but they are suitable for measuring the speed and volume of blood flow in peripheral blood vessels of the upper and lower limbs. There are calculated physiological parameters from the flow curves that are clinically used for assessing the state of blood supply to the body part. We can determine many values from the flow curves, like peripheral resistance, blood flow in systole and diastole, medium speed, etc. Study group of people are male and female students from 18 to 20 years. Doppler measurements have been performed before physical exercise and after physical exercise.
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Image processing software for infrared thermography study during radio frequency ablation
Zemčíková, Petra ; Sedlář, Martin (referee) ; Bernard, Vladan (advisor)
This thesis deals with principle and device of radiofrequency ablation technique, infrared imaging systems with a focus on non-contact measurement of surface temperatures, process of representation and detection of infrared radiation. On the next part of the thesis are described methods of image processing with an emphasis on the methods used in the software for processing infrared radiofrequency ablation images. The thesis also includes the design and the description of the created software for evaluating the effect of duration of ablation, used power or position of the electrodes and the stent to the stent heating.
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Children Terrain Electric Vehicle
Sedlář, Martin ; Rozsíval, Jan (referee) ; Blaťák, Ondřej (advisor)
The master’s thesis is focused on a conceptual design of a children terrain vehicle with electric drive. At the first part there are described children terrain vehicles rules, electric drives, regulations for a frame test and types of suspension. Then a suitable electric engine, an accumulator and other important parts of the vehicle are chosen. The following part describes the frame construction and its stress-strain analysis using Finite element method. The last part of thesis describes the suspension construction and front suspension kinematics solved in a multibody software. The result of thesis is a vehicle conceptual design created in CAD software Creo, supported by results of the stress-strain and kinematic analysis.
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Design of a Very Low Specific Speed Pump
Chabannes, Lilian ; Sedlář, Milan (referee) ; Drábková, Sylva (referee) ; Rudolf, Pavel (advisor)
Čerpadla s nízkými specifickými otáčkami nacházejí uplatnění v široké škále aplikací, ale trpí nízkou účinností a rizikem nestability křivky dopravní výšky. Tato disertační práce pojednává o vylepšení hydraulických parametrů čerpadla se specifickými otáčkami ns = 32. Práce se zaměřuje na průtok v oběžném kole a ve spirále, které jsou řešeny pomocí CFD. Průzkum literatury ukázal, že přidání mezilopatek do průtokového kanálu je účinný způsob, jak zlepšit neuspokojivé proudění obecně přítomné v oběžných kolech s nízkými specifickými otáčkami. Byla zkoumána poloha mezilopatky v kanálu a vliv počtu přítomných mezilopatek. Část výsledků je ověřena experimentálně v laboratoři fakulty. Rovněž je zkoumán tvar spirály a pozornost je věnována numerickému řešení proudění u stěn a jeho vlivu na simulaci. Po numerických výpočtech na třech různých spirálách je navržen nový tvar, který zlepšuje vypočtové parametry čerpadla při nízkém i vysokém průtoku.
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Vectorcardograms - long term signals
Sedlář, Martin ; Janoušek, Oto (referee) ; Kolářová, Jana (advisor)
This project deals with anatomy and electrophysiology of heart. It describes the structure of cardiac muscle, mechanism of myocard's contraction, heart work, the origin and registration of electric signals of heart – electrocardiogram (ECG) and vectorcardiogram (VCG). Part of the work is design and creation of a software application for calculation and graphical presentation of vectorcardograms, useful for experimental data available on ÚBMI VUT in Brno.
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2D barcode recognition system
Sedlář, Martin ; Richter, Miloslav (referee) ; Petyovský, Petr (advisor)
This bachelor’s thesis deals with 2D barcode reading. At the beginning a brief overview of the most used barcodes is shown. The work mainly deals with QR codes. Their structure, composition and rules for encoding and decoding are explained. Problems with arrangement of photographic scene are solved too. C++ algorithm for QR code reading is described with usage of the OpenCV library.
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Application of mathematical methods for object detection in ultrasound B-image
Ruttner, Michal ; Jiřík, Radovan (referee) ; Sedlář, Martin (advisor)
This work deals with the detection of objects in ultrasound B-image. First we will become familiar with the ultrasound device and its functions.We will demonstrate various kinds of imaging techniques used in ultrasound diagnostic imaging. Further we will be concerned with medical image processing. We will describe the functions of some edge detectors based on the first derivation, detectors based on the second derivation, detectors based on approximation of parametric model and detectors of borders or lines. Otherwise we will find out how to do preprocessing, Some of these methods we will try on different images for sharpening of image and enhacment of contoure. Using the program created in MATLAB©, we will use process imaging on internal carotid images. In conclusion we will evaluate the results.
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