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Objective: This study aims to estimate the annual doses for personnel categories following their exposure to ionizing radiation during their occupation in the external radiotherapy department of the Center of Oncology and Hematology (COH) at Mohammed VI Hospital in Marrakech.Materials and Methods:Operational dosimeters PACK MGP DMC3000 were used to measure the dose rates around the machines operating with ionizing radiation. In order to assess the reliability of the measurements made by these dosimeters, they were checked against measurements made at the same position by theInspector detector. The annual effective dosewas calculated by multiplying the average dose rate measured during a procedure by the overall treatment time throughout a year Results: Regarding the reliability checkof the measuring instrument, the recorded error is between 2 and 10% with an average of 7%. For personnel category A, the measured dose rate ranges from 0.066 to 0.083 μSv/h, with an average value of 0.075 μSv/h. For category B, it varies between 0.066 and 0.083 μSv, with an average value of 0.092 μSv/h. It is 0.074 μSv/h for category C. The annual dose for category A ranges from 0.089 to 0.113 mSv/year, with an average value of 0.101 mSv/year. For category B, it varies between 0.089 and 0.113 mSv/year, with an average value of 0.100 mSv/year. It is 0.100mSv/year for category C.Conclusion: The annual effective doses to personnel categories, assessed by this study, are very low compared to the regulatory standards set by the International Commission on Radiological Protection (ICRP). As a result, workers benefit from good radiation protection conditions within the Center of Oncology and Hematology at Mohammed VI Hospital in Marrakech
ABSTRACT
El objetivo de esta investigación fue determinar la relación entre la dosis de radiación recibida y la práctica en intervención médica. Se estudiaron estadísticamente los reportes dosimétricos de profesionales que han laborado en intervencionismo con un Arco en C en el Hospital José Carrasco Arteaga de la ciudad de Cuenca, Ecuador. Estos informes se basan en lecturas bimensuales de los dosímetros TLD utilizados por el personal para seguridad radiológica. En total, se analizaron 124 personas que trabajaron en el período de noviembre de 2013 a marzo de 2018, es decir, 24 informes. La dosis promedio anual para las enfermeras de quirófanos es de 1,32 mSv, 1,59 mSv para el personal de Urología, 1,74 mSv para el personal de Gastroenterología, 1,78 mSv para el personal de Hemodinamia y 2,33 mSv para el personal de Traumatología. Se concluyó que la dosis promedio para cada práctica no excede la dosis de restricción de 1/3 de la dosis permitida para trabajadores ocupacionalmente expuestos. Intervencionismo en Traumatología resulta ser la práctica con mayor dosis recibida y la más baja perteneció al personal de Enfermería de Quirófanos. Estos resultados son de gran utilidad para saber qué nivel va acorde con cada práctica médica.
The objective of this research was to determine the relationship between the radiation dose received and the practice in medical intervention. The dosimetric reports of professionals who have worked in intervention with a C-Arm at the José Carrasco Arteaga Hospital in the city of Cuenca, Ecuador, were studied statistically. These reports are based on bi-monthly readings of the TLD dosimeters used by the staff for radiological safety. In total, 124 professionals who worked in the period from November 2013 to March 2018 were analyzed, that is, 24 reports. The average annual dose for operating room nurses is 1.32 mSv, 1.59 mSv for urology staff, 1.74 mSv for gastroenterology staff, 1.78 mSv for hemodynamic staff and 2.33 mSv for trauma staff. It is concluded that the average dose for each practice does not exceed the restriction dose of 1/3 of the dose allowed for occupationally exposed workers. Traumatology is the practice with the highest dose received and the lowest belongs to the operating room nursing staff. These results are very useful to know which level is consistent with each medical practice.
Subject(s)
Humans , Male , Female , Radiation Protection/methods , Radiometry/methods , Radiation Dosage , Radiology, Interventional/trends , Health Personnel , Ecuador , Research Report , Radiation Dosimeters/standardsABSTRACT
Objective To investigate the eye lens dose to the operators who tended to test the quality control of positron emission tomography (PET).Methods Before encapsulation and in preparation of point source,line source 1 and line source 2,the two operators were worn with lens thermoluminescence dosimeter each at the left of the left eye,the front of the left eye,between the right eye and the left eye,the left of the right eye,and the front of the right eye.Measurement and analysis were made of the radiation doses to eye lens received by the operators in order to calculate their maximum annual doses.Results The maximum lens dose was 2 439.80 μSv for the test of 5 PETs.There appears to be the same trend in the eye lens doses for the first and second operators.(x2 =15.629-16.155,P ＜ 0.05).The first operator have received higher eye lens dose higher than the second(Z =2.611,P ＜ 0.05).Conclusions The dose to the eye lens for a single PET test is relatively low.
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Objective To provide the dose information from the epidemiological cohort established in 1980 in Jiangsu province using normalized workload method,and to estimate cumulative skin dose to medical diagnostic X-ray workers based on personal dosimeter were worn as members of the epidemiologicat cohort.Methods Data for fixed cohort members of X-ray exposure history from 1950 to June 2011 were collected.According to correction factors such as examination types and protection conditions,exposure doses from 1950s to June of 2011 were estimated through a Visual Basic language program.Results Average annual doses vary significantly between during different time periods:10.1 (6.1-12.3) mGy/year during 1950-1965,3.5 (2.1-5.4) mGy/year for 1966-1984 and 1.3 (0.9-1.9) mGy/year during 1985-2011,respectively.Conclusions Average annual doses received by 3 961 medical diagnostic X-ray workers during different time periods in this investigation are nearly consistent with the results reported previously and show a roughly similar trend.
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This study presents data on the externally received doses for radiation workers who used the Korea Radioisotope Association's personal monitoring and dose record keeping service from 1984. Distributions of annual dose by age of worker and occupational category were given. The number of radiation workers registered was 23,257 in 1997. The trend of the number of radiation workers and their annual doses increased since 1984. The measured radiation dose were generally low. The collective annual dose and the mean annual dose were 33.45 Sv and 1.44 mSv, respectively. Very few workers(0.5%) exceeded 20 mSv(2 rem) and only 1 exceeded 50 mSv, the legal limit for dose.