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National Repository of Grey Literature 5 records found  Search took 0.01 seconds. 
Optimization of Basic Magnetic Field Homogeneity in MR Tomography
 Hadinec, Michal ; Brančík, Lubomír (referee) ; Frollo, Ivan (referee) ; Bartušek, Karel (advisor)
This thesis is concerned with problems of measuring and mapping of magnetic field in MR tomograph, for purpose of magnetic flux density homogeneity optimization. Attention is paid to mapping techniques on rotary symmetric volume and to ways of magnetic fields optimization with utilization of passive and active correction systems. Theoretical analysis of magnetic field decomposition with utilization of spherical harmonics and numerical decomposition is made. Mapping and approximation techniques of basic magnetic field are verified by experiments in the laboratory at the Institute of Scientific Instruments AS CR in Brno.
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System for precise 3D capturing of the continues surface of the foot arch
 Fojtík, Tomáš ; Fliegel, Karel (referee) ; Kaller, Ondřej (advisor)
This thesis deals with the development of the user interface for the application of the method Phase shifting profilometry. First deals with the theoretical approach of this method, and describes the process of image segmentation and data processing using morphological operations. In the practical part of the user interface is designed for acquiring and processing data received in Matlab.
Detailed record
Optimization of Basic Magnetic Field Homogeneity in MR Tomography
 Hadinec, Michal ; Brančík, Lubomír (referee) ; Frollo, Ivan (referee) ; Bartušek, Karel (advisor)
This thesis is concerned with problems of measuring and mapping of magnetic field in MR tomograph, for purpose of magnetic flux density homogeneity optimization. Attention is paid to mapping techniques on rotary symmetric volume and to ways of magnetic fields optimization with utilization of passive and active correction systems. Theoretical analysis of magnetic field decomposition with utilization of spherical harmonics and numerical decomposition is made. Mapping and approximation techniques of basic magnetic field are verified by experiments in the laboratory at the Institute of Scientific Instruments AS CR in Brno.
Detailed record
System for precise 3D capturing of the continues surface of the foot arch
 Fojtík, Tomáš ; Fliegel, Karel (referee) ; Kaller, Ondřej (advisor)
This thesis deals with the development of the user interface for the application of the method Phase shifting profilometry. First deals with the theoretical approach of this method, and describes the process of image segmentation and data processing using morphological operations. In the practical part of the user interface is designed for acquiring and processing data received in Matlab.
Detailed record
Phase analysis using Fourier transform profilometry
 Mandát, Dušan ; Rössler, T. ; Hrabovský, Miroslav
The profilometry method used here is the Fourier-Transform Profilometry Method that was originally published by Takeda in 1982. The geometry of the experiment is very similar that used in Moiré Topography, but the advantage of this method is only one image of the projected grating is necessary to produce the resulting object´s fringes.
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