Biophysics & Radiotherapy
Ruhollah Ghahramani-Asl; Aida OmidBakhsh; parisa soleimanpor
Abstract
Introduction: The spread of the COVID-19 disease and respiratory symptoms in affected patients have increased requests for high-resolution computed tomography (HRCT) imaging. It have increased the workload and radiation exposure of employees in radiology departments.
Materials and Methods: The present ...
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Introduction: The spread of the COVID-19 disease and respiratory symptoms in affected patients have increased requests for high-resolution computed tomography (HRCT) imaging. It have increased the workload and radiation exposure of employees in radiology departments.
Materials and Methods: The present descriptive-analytical study examined the number of CT scans performed between 1398 and 1402 in the affiliated hospitals of Sabzevar University of Medical Sciences.
Results: According to the graphs comparing the years 1398 to 1402, it can be seen that the highest number of requests for CT scan in these five years is related to Shahrivar 1400 with the number of 9677 requests registered in this month, which can indicate the high prevalence of the Coronavirusin this month. After that, Mordad 1400 has the second rank with 9394 requests, which to some extent reveals the fact that 1400 was a critical year in terms of the spread of the Corona pandemic and overall, the year 1400 was the worst year in terms of the spread of the Corona pandemic, which accounted for the highest spread of the virus.
Conclusion: The spread of respiratory diseases, the increase in requests for HRCT scans, and the lack of manpower in these departments cause the amount of radiation exposure to reach the limits of the body's tolerable dose and sometimes exceed this amount. Accordingly, it is recommended taking necessary measures to prevent problems that are more serious for radiology personnel at risk.
Mahmoud Mohammadyan; zahra darzi azadboni; reza ali mohammadpour tahmtan; Razieh Yousefi nejad
Volume 27, Issue 2 , July and August 2020, , Pages 193-199
Abstract
Abstract:Background and purpose: More than 2 million people are exposed to wood dusts every day around the world. Exposure to wood dust increases the prevalence of respiratory diseases and cancer incidence. Therefore, this study was carried out to evaluate the risk assessment of workers exposure to inhalable ...
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Abstract:Background and purpose: More than 2 million people are exposed to wood dusts every day around the world. Exposure to wood dust increases the prevalence of respiratory diseases and cancer incidence. Therefore, this study was carried out to evaluate the risk assessment of workers exposure to inhalable wood dust in the carpentries in Sari City.Materials and Method: This cross-sectional study conducted in 27 carpentries in Sari City in septumber, October and November ,2017. 43 workers were selected randomly. Inhalable wood dust were measured in the basis of the standard method number 0500 recommended by NIOSH using a calibrated personal sampling pump and an IOM sampler. The risk of exposure to wood dust then was measured using a recommended method by Singapore institute of occupational safety and health. Result: The average concentration of the inhalable wood dust in total carpentries was 15.30( mg)/m^3 and also in carpentries , MDF cutting, MDF/Carpentry, wood cutting, furniture making and wood carving workshops were 18.58±11.94, 19.49±17.3,8.32±7.5,10.48±6.05,3.44±3.98,4.77±0 mg/m^3 respectively. There was a significant correlation between the concentration of inhalable wood dust and the ambient temperature and the general ventilation. The risk of Exposure to inhalable wood dust were evaluated in the medium levels for all workshops. Conclusion: The workers’ personal exposure to inhalable wood dust in carpentries in sari city was higher than Occupational Exposure Limit recommended by national and international recommended levels. The higher workers’ exposure to inhalable wood dust was found in lower ambient temperature and in the absence of general ventilation.