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Wyszukujesz frazę "Mazgaj, P." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Optimization of fMRI Analysis of Speech Areas in Pre- and Postoperative Diagnostics
Autorzy:
Karpiel, I.
Drzazga, Z.
Mazgaj, P.
Drzazga, M.
Giec-Lorenz, A.
Powiązania:
https://bibliotekanauki.pl/articles/1030510.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.57.Nk
87.61.Pk
87.66.Ur
Opis:
Functional magnetic resonance imaging (fMRI) was used to characterize relevant functional areas adjacent to the tumor what has important implications for surgical intervention. The aim of our study was to evaluate the functional areas of Broca and Wernicke responsible for production and understanding the speech which are very important from the point of view patients quality life using different variants of analysis available in the SPM package. Brain activity imaging with FWE controlling seems to be more appropriate than this with un uncorrected thresholds in clinical diagnostic. However analysis in the SPM should be carried out with great care taking into consideration that results can be influenced by parameters used in statistical approaches.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 728-730
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of MRI to Measure Whole Brain Atrophy in MS Patients
Autorzy:
Mazgaj, P.
Drzazga, Z.
Karpiel, I.
Giec-Lorenz, A.
Krzystanek, E.
Powiązania:
https://bibliotekanauki.pl/articles/1030775.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.57.Nk
87.61.Pk
87.66.Uv
Opis:
Nowadays magnetic resonance imaging is used for anatomical assessment of human brain structures in neurodegenerative disorders causing brain atrophy for instance in multiple sclerosis (MS) or in Alzheimer Disease. Pathological brain tissue loss can be described in terms of change in the brain parenchymal fraction (BPF). This work shows the impact of segmentation method in SPM12 and additional segmentation in Computational Anatomy Toolbox (CAT12) on calculated BPF value for patients suffer from with MS no treated and treated with disease-modifying drug (DMD) interferon-beta (INFb) for one year and two years. Both methods confirm that brain parenchymal fraction decreases with age, nevertheless for patients not treated INFb decreases faster than for treated. An usability of Lesion Segmentation Tool toolbox in process of automatic detection and segmentation T₂ hyperintense lesions in FLAIR images is discussed.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 725-727
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An algorithm for Bayes parameter identification with quadratic asymmetrical loss function
Autorzy:
Kulczycki, P.
Mazgaj, A.
Powiązania:
https://bibliotekanauki.pl/articles/970992.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
sterowanie optymalne
parameter identification
Bayes decision
quadratic asymmetrical loss function
kernel estimators
optimal control
Opis:
The paper deals with the estimation problem of model parameter values, in tasks where overestimation implies results other than underestimation, and wliere losses arising from this can be described by a quadratic function with different coefficients characterizing positive and negative errors. In the approach presented, the Bayes decision rule was used, allowing for minimizing potential losses. Calculation algorithms were based on the theory of statistical kernel estimators, which frees the method from distribution type. The result constitutes a complete numerical procedure enabling effective calculation of the value of an identified parameter or - in the multidimensional case - the vector of parameters. The method is aimed at both of the main contemporary approaches to uncertainty modeling: probabilistic and fuzzy logic. It is universal in nature and can be applied in a wide range of tasks of engineering, economy, sociology, biomedicine and other related fields.
Źródło:
Control and Cybernetics; 2005, 34, 4; 1127-1148
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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