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Detector of bubbles in blood
Foltýn, Vojtěch ; Sekora, Jiří (referee) ; Rozman, Jiří (advisor)
ABSTRAKT This thesis is the theoretical part deals with various ways of cleansing the blood, with a focus on hem dialysis. Describes the technical solution and monitor the dialysis flow diagram of blood and dialysate. The paper describes various solutions to detect bubbles in the blood and their advantages and disadvantages. Based on the best method of detection are designed detector bubbles. Working in the practical part contains a proposal detector set for venous diameter of 20 mm. Equipment to detect bubbles allows for connection to a blood pump discontinue its activities. Output works are drawing diagrams, printed circuit board design and implementation of graphs circuits.
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Thermoacoustic measurement of ultrasonic power
Vysoudil, Ladislav ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
The assignment of this work is to suggest structural design of thermoacoustic sensor and experimentally verify his function for testing intensity of ultrasound diagnostic systems. Then the measured results are compared with measurement by the hydrophone in ultrasonic measuring tank. Opening part of this work is focused on functional description of sensors and their construction, including functional description and construction of hydrophone. The rest of the work deals with project of thermoacoustic sensor and measuring with sensor and hydrophone and evaluation results of measurement. Intention of this work is to verify the correct function of designed thermoacoustic sensor with the help of comparison measurement with hydrophone.
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Doppler blood flow detector
Klügl, Jan ; Čech, Petr (referee) ; Rozman, Jiří (advisor)
This bachelor's thesis is engage in suggestion of nondirection doppler blood flow detector with unmodulated carrying wave. At first the thesis describes indicator's principle of working and mention the systemic proposal for working frequency and intensity of ultrasound. Later in detail describes individual blocks, which are the detector consist of. At every block of system is mentioned the diagram of connection and values of components, which are ascertained from calculation, simulation and recommendation of producer.
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Model nonlinear effect in ultrasound fields
Kulík, Tomáš ; Čech, Petr (referee) ; Rozman, Jiří (advisor)
The main topic of this diploma thesis is the modeling of nonlinear effects in ultrasonic fields. The work deals with application of finite difference method (FDTD) on the Westervelt equation and the subsequent creation of the model of ultrasonic fields in MATLAB. This thesis also includes theoretical analysis of ultra-acoustic and technical aspects of diagnostic ultrasonography. In addition, this document includes verification of theoretical assumptions by using created model.
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Properties measurement of ultrasound system in ophthalmology
Grebíková, Lucie ; Mézl, Martin (referee) ; Harabiš, Vratislav (advisor)
The thesis deals with physical principles of ultrasound with following specialization on ophtalmic ultrasound system Nidek Echoscan 4000 and its properties. And also it deals with description of investigative techniques in ophthalmology (A-mode, B-mode, biometry and pachymetry). Next, they was suggested procedures of measurement and that is spatial resolution (axial and lateral spatial resolution) and propagation speed of ultrasound depending on the temperature. Then these properties was tested on laboratory phantoms of eye – ETETECH LTD. and Multipurpose Ultrasound Phantom but on created phantoms of eye too, which will be made from agarose gel with build-in materail (fishing line, plastic film, plastic bag and rubber). At the end, measured values was processed in the generated program.
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Specifics of assessment of old concrete structures
Mička, Michal ; Žítt, Petr (referee) ; Cikrle, Petr (advisor)
The bachelor thesis deals with evaluation of properties materials concrete structures of former textile factory Vlněna from the 19th century in Brno. The content of this work is divided into the theoretical and practical part. The theoretical part deals with the description of the methods used in the research of reinforced concrete structures, comparison of the types of beams used in the past with used today and unlike the principles of the design of reinforced concrete structures in the 1920s and 30s of the 20th century compared to the present time. There are also described components, properties and technologies of concrete production in the period between the war and the comparison with the present time. The practical part consists of on-site examinations and sampling. A large part consists of the evaluation of laboratory tests on the test samples taken from the solved part. A total of 24 test samples were performed. It also compares the strength of the concrete reinforcement with the reinforcement used today.
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Ultrasound Image Sequence Segmentation
Gallo, Vladimír ; Walek, Petr (referee) ; Mézl, Martin (advisor)
This paper presents basic principles of ultrasonography, review of different modes of medical ultrasound imaging, principle of contrast-enhanced ultrasonography and review of basic techniques of image segmentation. The individual methods based on edge detection and region growing were implemented in Matlab. The performance of algorithms were tested in each category using synthetic and phantom image data.
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Distance meter with ESP32
Havelka, Jan ; Hanák, Pavel (referee) ; Lattenberg, Ivo (advisor)
The aim of this thesis was to implement a distance meter with two sensors (ultrasonic and laser) with an ESP32 microcontroller. Then the ability to display measured values on the display and via the web interface. The first part deals with the theory of ultrasound and laser, their use as distance meters and a summary of advantages and disadvantages. The following chapter describes the design of the distance meter with all the components that will be used. The third chapter focuses on the implementation of the distance meter. It was created wiring diagram and designed printed circuit board that handled all mutual communication between the ESP32 and other peripherals. The whole device is placed in a box in the shape of a pistol printed on a 3D printer. The next part of the work briefly describes the software of the distance meter written in the C programming language in the development environment Arduino IDE. Finally, images of the final product were inserted into the work and test measurements were performed, the result of them is written into tables, graphs and subsequently evaluated.
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Highway bridge diagnostics
Křepelka, Jan ; Suza, Igor (referee) ; Cikrle, Petr (advisor)
This thesis deals with the inspection and construction-technical survey of the highway bridges D2-058..1 and D2-058..2. These structures ale located on the border with the Slovak Republic and were built in 1980. The thesis is focused on the substructure of this long overpass, because of its major failures caused by leaking water. Theoretical part contains information about construction-technical surveys of the bridges, bridges inspections and theory of ultrasound methods. That method has been used in the practical part for identification of the damage extent. Also, material property have been verified and overall condition of the substructure has been evaluated.
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