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Wyszukujesz frazę "high-resolution computed tomography" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Pneumoconiosis and respiratory problems in dental laboratory technicians: Analysis of 893 dental technicians
Autorzy:
Ergün, Dilek
Ergün, Recai
Özdemir, Cengiz
Öziş, Türkan N.
Yilmaz, Hinç
Akkurt, İbrahim
Powiązania:
https://bibliotekanauki.pl/articles/2178891.pdf
Data publikacji:
2014-10-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
pneumoconiosis
dental laboratory technicians
occupational respiratory disease
pulmonary function
high-resolution computed tomography
Opis:
Objectives: To explore the rate of pneumoconiosis in dental technicians (DTP) and to evaluate the risk factors. Material and Methods: Data of 893 dental technicians, who were admitted to our hospital in the period January 2007–May 2012, from 170 dental laboratories were retrospectively examined. Demographic data, respiratory symptoms, smoking status, work duration, working fields, exposure to sandblasting, physical examination findings, chest radiographs, pulmonary function tests and high-resolution computed tomography results were evaluated. Results: Dental technicians’ pneumoconiosis rate was 10.1% among 893 cases. The disease was more common among males and in those exposed to sandblasting who had 77-fold higher risk of DTP. The highest profusion subcategory was 3/+ (according to the International Labour Organization (ILO) 2011 standards) and the large opacity rate was 13.3%. Conclusions: To the best of our knowledge, it was the largest DTP case series (N = 893/90) in the literature in English. Health screenings should be performed regularly for the early diagnosis of pneumoconiosis, which is an important occupational disease for dental technicians.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2014, 27, 5; 785-796
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High resolution x-ray tomography as a tool for analysis of internal textures in meteorites
Autorzy:
Krzesińska, A.
Powiązania:
https://bibliotekanauki.pl/articles/411476.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
NWA-5929
Ghubara
Pułtusk
wysoka rozdzielczość X-ray tomografii komputerowej
deformacja
high resolution X-ray computed tomography
deformation
Opis:
A comparison of internal textures of the NWA-5929, Ghubara and Pułtusk chondrites has been carried out using high resolution X-ray tomography. This is a powerful, non-destructive technique that allows on to determine textural and compositional dierences that occur between ordinary chondrites of various groups by means of grey-levels calehistograms, first-order statistics, and 3D imaging. Deformational structures in the Pułtusk meteorite such as cataclastic zones, impact melt clasts, melt veins, and melt pockets are observed and studied. Measurements of metal particle size are achieved, giving even deeper insight into textural features of meteorite. My approach shows that as shock deformation occurred, numerous small metal grains became progressively dispersed within the volume of the deformed Pułtusk meteorite rock. Simultaneously, metal was mobilized via frictional or direct impact melting to form scarce large metal nodules or grains arranged along the margins of relict chondritic clasts or as components of irregular injection veining. The possibility of tracing of these impact related processes by using tomography micrograms (without breaking the sample) is very useful for distinguishing which parts of each meteorite were deformed in diferent ways in order to make first order observations regarding the deformational history of these meteorites.
Źródło:
Meteorites; 2011, 1, 1; 3-12
2299-0313
2299-1220
Pojawia się w:
Meteorites
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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