National Repository of Grey Literature 14 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
Použití DSP96002 pro zpracování a přenos dat v MR tomografii
Bartušek, Karel ; Dokoupil, Zdeněk ; Smékal, Z. ; Gescheidtová, E.
The application of a DSP96002 digital signal processor in measuring and transferring data, setting the pre-emphasis constants, and communicating with the MR tomograph is described in the paper. The application of the digital signal processor represents a modern approach to real-time processing of MR signals. The objective is to obtain distance communication with the tomograph via the Internet.
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.
Srovnání NMR a indukčních metod pro měření slabě magnetických materiálů
Bartušek, Karel ; Steinbauer, M.
This paper shows the way for magnetic susceptibility determination for weakly magnetic materials giving no MR signal by means of induced inhomogeneity. The results obtained by Finite Elemnt Method (FEM) modeling as well as data measured by MRI are introduced. Properties of described method are compared with measurement based on inductive method.
Zvýšení rozlišení MR obrazů váhovanývh relaxačním časem T2
Bartušek, Karel ; Gescheidtová, E. ; Steinbauer, M.
The paper deals with the possibility to increase resolution in a measured MR image weighted by relaxation constant T2 of nuclei in the sample via suppresing spin density weighting. This method of image processing is besed on measuring the MR of images by the spin echo technique for two time values and on the calculation of their quotient.
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.
Susceptibilita slabě magnetických materiálů – srovnání NMR a induktivních měření
Steinbauer, M. ; Bartušek, Karel ; Foltýn, D.
This paper shows the way for magnetic susceptibility determination for weakly magnetic materials giving no MR signal by means of induced inhomogeneity. The results obtained by Finite element method (FEM) modeling as well as data measured by MRI are introduced. Data obtained by described method are compared with measurement based on inductive method.
Přenos a zpracování dat v MR tomografii s využitím digitálního signálového procesoru
Bartušek, Karel ; Dokoupil, Zdeněk ; Smékal, Z. ; Gescheidtová, E.
The application of a DSP96002 digital signal processor in measuring and transferring data, setting the preemphasis constants, and communicating with the MR tomograph is described in the paper. The application of the digital signal processor represents a modern approach to real-time processing of MR signals. The objective is to obtain distance communication with the tomograph via the Internet.
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.
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.
MR Measurement Technique of the Rapidly Switched Gradient Magnetic Fields in MR Tomograph
Bartušek, Karel ; Geschneidtová, E.
Fast and precise decreasing of the gradient magnetic fields to the level of the field homogeneity is an important prerequisite for most NMR spectroscopic and localised spectroscopy experiments, because it allows the use of a short echo time and generation of a minimum undesirable echo.

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