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Měření magnetické susceptibility metodou MRI
Steinbauer, M. ; Bartušek, Karel ; Fiala, P.
A magnetic resonance imaging method is described for measuring the magnetic susceptibility ofweakly magnetic materials giving no MR signál. Method is based on MR gradient echo imaging phase signál, using its independency on T, time. The results obtained by Finite element method (FEM) modeling as well as data measured by MRI are introduced.
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Measurement the induction of magnetic field around an applicator for magnetotherapy
Bartušek, Karel ; Gescheidtová, E. ; Steinbauer, M.
The paper deals with measuring magnetic induction by imaging techniques based on magnetic resonance (MR) and describes experimental results od mapping the magnetic induction of a dermatological applicator for magnetotherapy performed by MR imaging techniques. The results are compared with theoretical calculation and with measurement carried out with an ordinary magnetometr. The conclusion derived from the measurement will be used in the design of a new applicator with complex electronic control of magnetic field.
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The system for 129Xe polarization - the operating modes
Rychnovský, Jan
The main tendency of this paper is to bring a close view of polarization 129Xe that can be used in NMR analyses. Nuclear Magnetic Resonance - NMR, creates a base for an elementary spectroscopic analysis of unknown substances. The main experiment is still in theoretical preparations. But principle of the described system will be used in practice. We have a theoretical attainments about the research and small details are solved. Above all I write about operating modes which will occur during the polarization of 129 Xe.
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Relaxation Processes in NMR
Rychnovský, Jan
The main tendency of this paper is to bring an explanation of the relaxation times that are concur in Nuclear Magnetic Resonance (NMR). I remind primarily what is the NMR and spectroscopy. After that relaxation processes, which occur in NMR, are explained as well as their measurement.
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