Kajian pemantauan dosis neutron terhadap pekerja radiasi pada pengoperasian Linac dengan energi foton ≥ 10 MV

The use of Linac for radiotherapy is starting to use a lot of high-energy photons of 10 MV; in addition, some use 15 MV for patient therapy in routine use, there is also the use of 6 MV. The purpose of this study is to obtain an overview and information of the neutron dose that has the potential to provide additional doses for radiation workers operating the Linac 10 MV aircraft. Based on the Regulation of the Head of BAPETEN No. 3 of 2013, Article 48 paragraph (2) states that in the operation of Linac with X-ray photon energies above 10 MV, must coat the shield wall with a neutron-absorbing material. The statement follows the IAEA-TecDoc 1891 that neutrons will have the potential to have a significant radiological impact on workers if routinely operated at energies above 10 MV, so must consider protection for workers. The results of a survey from 27 hospitals, obtained information through filling out questionnaires and discussions and validated with B@LIS Pendora, it found that the trend of annual doses received by each profession in the operation of Linac 6 MV, 10 MV, and 15 MV was less than one mSv, only partially small worker dose that is above one mSv (above the 90th percentile). This study concluded that the presence of neutrons in Linacs up to 10 MV was deemed not to have a significant radiological impact on workers. The recommended criteria/mechanism for monitoring worker neutron doses in Linacs up to 10 MV could be based on if the safety study results obtained a dose received by workers 1.5 mSv/year. Then, there is no need to monitor the neutron dose. If the measurement results of exposure to neutron and gama radiation around the Linac space are 7.5 microSv/hour, there is no need for neutron monitoring. In Linacs above 10 MV, if the annual effective dose is 1.5 mSv/year, there is no need to monitor the dose of special neutron personnel. Still, routine radiation exposure monitoring may be considered every two years. Keywords: Neutron Dose, Radiation Worker, Linac, Dose Monitoring.

Study on Work Safety for Employees in Radiology Department

Background: Working staff in the radiology department are exposed to harmful factors such as Radiation exposure, injuries; needle pricks while performing an investigation, leads to exposure to body fluids, muscle stress due to wearing heavy lead aprons, and while moving portable equipment for examinations. Strategies to prevent and reduce such harmful factors are guaranteed by taking regular inspections by radiation safety officers. Safety supervision in radiology is important in shielding the patients, radiologists and healthcare staff. Observational safety audits and regular inspections in the radiology department for staff safety are the main and important parts of this study. Objective: To assess and evaluate the current safety measures in Radiology Department and Scope of innovations and interventions in current working safety condition awareness. Methods: All employees working in radiology department satisfying the inclusion criteria are evaluated for the study. A survey carried out related to general working and routine procedures carried out in radiology department. Regular audits and inspection studies are covered in the study. The study consists of closed-ended questions regarding the profession and the knowledge of the basic safety measures in diagnostic and special scans in radiology department. Results: Employees in the radiology department are highly aware about work safety measures. There are regular safety audits and inspection studies are carried out by RSO and concerning departments. There is also scope for radiation workers to have introductory seminars on radiation safety before they start working with radiation. Conclusion: Working in the radiology department has several types of safety risks, which can be barred or compact if manage suitably. Informally with these types of risks and their penalty, agreement with policy and strategy on work ecological safety, and expansion of a traditions that supports supervision, treatment, and on time conduct will go far toward civilizing overall employee security for all employees in the radiology department.

Reconstructive dosimetry and radiation dose evaluation of workers and public due to a brazilian radiological accident in industrial radiography

Radiological accidents occur mainly in the practices recognized as high risk and which are classified by the IAEA as Categories 1 and 2: radiotherapy, industrial irradiators and industrial radiography. In Brazil, 5 important cases in industrial gamma radiography occurred from 1985 to 2018, involving 7 radiation workers and 19 members of the public. The accidents caused localized radiation lesions on the hands and fingers. One of these accidents is the focus of this paper. In this accident, a 3.28 TBq 192Ir radioactive source was left unshielded for 9 hours in a NDT company parking lot, and many radiation workers, employees and public, including teachers of a primary school were exposed. The radioactive source was also directly handled by a security worker for about 1.5 min causing severe radiation injuries in the hand and fingers. This paper presents radiation dose estimates for all accidentally exposed individuals. Four scenarios were considered, and three internationally recognised and updated reconstructive dosimetry techniques were used, named, Brazilian Visual Monte Carlo Dose Calculation (VMC), Virtual Environment for Radiological and Nuclear Accidents Simulation (AVSAR) and RADPRO Calculator®. The main radiation doses estimated by VMC were the absorbed dose of 34 Gy for the security worker’s finger and his effective dose of 91 mSv; effective doses from 43 to 160 mSv for radiation workers and NDT employees; and effective doses of 9 mSv for teachers in the schoolyard.

Non-cancer disease prevalence and association with occupational radiation exposure among Korean radiation workers

Radiation-induced cancer risks have known stochastic effects; however, regarding non-cancer diseases, evidence of risk at low radiation doses remains unclear. We aimed to identify underlying characteristics concerning non-cancer disease prevalence and determine associations with radiation dose among Korean radiation workers. Using a nationwide baseline survey, 20,608 workers were enrolled. Data concerning participant demographics, occupational characteristics, lifestyle, and lifetime prevalence of non-cancer diseases were linked to a national dose registry. We compared non-cancer disease prevalences in the Korean general population with those in this cohort and undertook a dose–response analysis concerning the cumulative dose. Hyperlipidemia (10.6%), circulatory (9.6%), and respiratory (4.1%) system diseases, followed by thyroid diseases (3.5%), had the highest prevalences, with hyperlipidemia, thyroid diseases, and hepatitis prevalence being higher in the cohort than in the general population. Radiation doses were associated with elevated prevalences of most diseases; however, associations were attenuated and not significant after adjusting for confounders, except for musculoskeletal system diseases (prevalence odds ratio [POR]/10 mSv, 1.03; 95% confidence interval [CI] 1.00–1.07) and cataracts (POR/10 mSv, 1.04; 95% CI 1.00–1.07). Further studies are warranted to investigate the causality of those non-cancer diseases involving more varied confounders such as physical and psychosocial stresses and ultraviolet light.

Common sources of radiations in a medical environment

Use of radiation is now a days so common in most of the tertiary care hospitals for diagnostic and therapeutic purpose. The ionizing radiation provides many benefits in both diagnostic as well as therapeutic interventions, but they are also potential harmful. Radiation risks, exposure and mitigation strategies should always be in mind while using to an individual (public, radiation worker, and patient) and the environment should not exceed the prescribed safe limits. Regular monitoring of hospital area and radiation workers is mandatory to assess the quality of radiation safety. This review article emphasis on radiation risks, exposure and prevention and treatment strategies.

Analysis Of The Application Of Occupational Safety and Health (K3) Management To Radiation At The Radiology Installation Of Ernaldi Bahar Hospital, South Sumatra Province

Introduction: The radiation dose is not controlled then the dose value will be accumulated. Then the dose received will be higher so that it can cause a drastic reduction in the number of lymphocytes. The purpose of this study was to analyze the application of occupational safety and health (K3) management to radiation at the radiology installation of Ernaldi Bahar Hospital, South Sumatra Province. Methods: This study uses qualitative methods with observational approaches, interviews and document studies. Result: The application of radiation safety management requirements at the radiology installation of Ernaldi Bahar Hospital, South Sumatra Province has not been carried out optimally. The application of radiation protection requirements, application of technical requirements, application of safety verification and health monitoring of radiation workers have been carried out properly. Conclusion: The implementation of occupational health and safety management on radiation at the radiology installation of Ernaldi Bahar Hospital, South Sumatra Province, has been going well. Keywords: Radiation, Management to Radiation, X-ray