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Power measurement in ultrasound fields
Škůrek, Pavel ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
This work is focused on the developement of a sensor, which enables to measure the ultrasonic power by heat effect of the mechanical Wales. The princip of two basic kinds of thermoacoustic sensor is descibed here – one level and two level sensor. This work also contains a proposition of these sensors with description of each parts and a trial to find suitable absorber. Achieved results, which support the function of the sensors are presented here by form of graphs and tables. Measuring by thermoacoustic sensors is confronted here with measuring of ultrasonic by hydrophone, which is used as reference measuring.
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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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Thermoacoustic measurement of ultrasonic power
Kučera, Václav ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
The thesis deals with ultrasound intensity and power measuring methods of the medical diagnostic systems, especially with thermoacoustic method. Then the concept of thermoacoustic sensor is processed and it is checked by comparison with the power of ultrasound system measured by the hydrophone in ultrasonic measuring tank. In the leading chapter basic parameters of general ultrasonic field are described. Next part deals with particular ultrasound intensity and power measuring methods. The last part deals with projecting of the thermoacoustic sensor, measuring with this sensor, measuring with hydrophone and comparison of this measurements.
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The effect of therapeutical ultrasound and metalic nanoparticles on carcinoma cells
Kalužová, Adéla ; Rozman, Jiří (referee) ; Bernard, Vladan (advisor)
This thesis focuses on the research of an effect of ultrasound and nanoparticles on cancer cells. In the literature search there the applications of ultrasound field in the interaction with aplication of metallic nanoparticles to viability of cancer cells are described, on the basis of in vitro experiments‘ performance. The purpose of metallic nanoparticles‘ application should be a possible reinforcing of its antitumor effect thanks to the presence of ultrasound field. In next part of the literature search there are included the technical performance of devices, their indications and contraindications, parameters of ultrasound fields and application of metallic nanoparticles. The metallic nanoparticles have been becoming a part of the human’s life more and more, that is why it’s necessary to deal with these miniature particles at a higher level. The aim of this thesis is to suggest the ways of resolution based on the principle of sounding of cells with the ultrasound field of suitable parameters and in combination with the application of metallic nanoparticles with a successive performance of the cell viability tests. The viability was determinated by the MTT assay test. Another part of this work is the measurement of parameters of this zone by means of a submersible needle hydrophone, for a better understanding of the ultrasonic zone. In the final part of this work there is necessary the statistical evaluation of the measured data of the experiments carried out and the discussion of the results obtained.
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Measurement of ultrasonic beam parameters
Hlavatý, Radek ; Fialka, Jiří (referee) ; Beneš, Petr (advisor)
The work deals with methods of measuring the parameters of the ultrasonic beam generated by piezoelectric sensors. The theoretical part contains a literature search of methods for the analysis of the ultrasonic beam generated by piezoelectric transducers with dimensions of units of millimeters. The problematics of measurement using piezoelectric or optical fiber hydrophones is investigated in more detail. The scope of the practical part of the work is the design and implementation of measuring equipment that allows spatial analysis of the beam during propagation by a complicated signal path, for automotive level and concentration sensors of the company Vitesco Technologies s.r.o. The system uses a hydrophone method to measure the ultrasonic beam. Due to test measurements, the repeatability of the measured results is confirmed, the results are discussed in the end.
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Measurement of ultrasonic beam parameters
Hlavatý, Radek ; Fialka, Jiří (referee) ; Beneš, Petr (advisor)
The work deals with methods of measuring the parameters of the ultrasonic beam generated by piezoelectric sensors. The theoretical part contains a literature search of methods for the analysis of the ultrasonic beam generated by piezoelectric transducers with dimensions of units of millimeters. The problematics of measurement using piezoelectric or optical fiber hydrophones is investigated in more detail. The scope of the practical part of the work is the design and implementation of measuring equipment that allows spatial analysis of the beam during propagation by a complicated signal path, for automotive level and concentration sensors of the company Vitesco Technologies s.r.o. The system uses a hydrophone method to measure the ultrasonic beam. Due to test measurements, the repeatability of the measured results is confirmed, the results are discussed in the end.
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Thermoacoustic measurement of ultrasonic power
Kučera, Václav ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
The thesis deals with ultrasound intensity and power measuring methods of the medical diagnostic systems, especially with thermoacoustic method. Then the concept of thermoacoustic sensor is processed and it is checked by comparison with the power of ultrasound system measured by the hydrophone in ultrasonic measuring tank. In the leading chapter basic parameters of general ultrasonic field are described. Next part deals with particular ultrasound intensity and power measuring methods. The last part deals with projecting of the thermoacoustic sensor, measuring with this sensor, measuring with hydrophone and comparison of this measurements.
|
|
|
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.
|
|
|
The effect of therapeutical ultrasound and metalic nanoparticles on carcinoma cells
Kalužová, Adéla ; Rozman, Jiří (referee) ; Bernard, Vladan (advisor)
This thesis focuses on the research of an effect of ultrasound and nanoparticles on cancer cells. In the literature search there the applications of ultrasound field in the interaction with aplication of metallic nanoparticles to viability of cancer cells are described, on the basis of in vitro experiments‘ performance. The purpose of metallic nanoparticles‘ application should be a possible reinforcing of its antitumor effect thanks to the presence of ultrasound field. In next part of the literature search there are included the technical performance of devices, their indications and contraindications, parameters of ultrasound fields and application of metallic nanoparticles. The metallic nanoparticles have been becoming a part of the human’s life more and more, that is why it’s necessary to deal with these miniature particles at a higher level. The aim of this thesis is to suggest the ways of resolution based on the principle of sounding of cells with the ultrasound field of suitable parameters and in combination with the application of metallic nanoparticles with a successive performance of the cell viability tests. The viability was determinated by the MTT assay test. Another part of this work is the measurement of parameters of this zone by means of a submersible needle hydrophone, for a better understanding of the ultrasonic zone. In the final part of this work there is necessary the statistical evaluation of the measured data of the experiments carried out and the discussion of the results obtained.
|
|
|
Power measurement in ultrasound fields
Škůrek, Pavel ; Čížek, Martin (referee) ; Rozman, Jiří (advisor)
This work is focused on the developement of a sensor, which enables to measure the ultrasonic power by heat effect of the mechanical Wales. The princip of two basic kinds of thermoacoustic sensor is descibed here – one level and two level sensor. This work also contains a proposition of these sensors with description of each parts and a trial to find suitable absorber. Achieved results, which support the function of the sensors are presented here by form of graphs and tables. Measuring by thermoacoustic sensors is confronted here with measuring of ultrasonic by hydrophone, which is used as reference measuring.
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