Background: All acts of radiation use, both for diagnostics, therapy and nuclear medicine, must go through a process of justification, limitation and optimization so that patients, officers and the surrounding environment get as much diagnostic benefit as possible with the smallest possible radiation risk. Some problems that arise in the Hospital / clinic, often ignore and do not pay attention to work exposure safety factors. The purpose of this study was to determine the profile of occupational radiation exposure and the effectiveness of radiation shielding in the radiology department of the Semarang city then compared to the reference dose to determine the optimization of radiation protection. Methods: The type of research conducted is quantitative research with a survey and observational approach. Exposure measurements were carried out in 5 radiology department, which included 3 hospitals and 2 clinical laboratories. Documents and room observations are also carried out. For the effectiveness of the radiation barrier it is also measured before and after the radiation shielding by using a surveymeter tool. The results data are then presented in descriptive analyses. Results: The results of the study of radiation exposure profiles in five radiology institutions, four institutions there was radiation exposure recorded on the surveymeter tool, with the largest exposure value was 0.099 mSv / h (still below the safe limit of 1 mSv / year). Only one hospital is safe, and there are no leaks. Conclusions: The effectiveness of the radiation retaining wall, four hospitals have a barrier level equal to 1 mm Pb at 80 kVp irradiation, and 1 hospital (RSJ) has a radiation barrier equivalent to 0.5 mmPb.
Introduction: Quality and dose factors are very important in radiodiagnostics. To produce a constant radiographic quality, the density and contrast produced must remain constant. There is a rule that aims to produce a constant radiographic quality by adding the exposure value, namely the 10 kV rule. This study was conducted to determine the noise in the computed radiography image with the thorax organ produced by modifying the exposure factor of the 10 kV rule and whether it is still within tolerance.Methods: This quantitative research was conducted with an experimental approach. This is done by taking a series of radiographs that include three exposure factor settings, standard (60 kV, 10 mAs), increased by 10 kV (70 kV, 5 mAs) and lowered by 10 kV (50 kV, 20 mAs). Noise measurement is done by doing ROI in the background area. The exposure index and deviation index values were also recorded as quality and dose references. The data was processed and analyzed by statistical tests.Results: From the statistical test results, there is a significant relationship between kV and noise with a sig (1-tailed) of ,000. Noise on the standard exposure factor has a lower noise than the modified exposure factor with a difference of 0.2. From the quality aspect, the most optimum exposure index and deviation index indicators are in the range of 70 KV and 5 mAs.Conclusion: The results of the statistical test of the relationship of kV to noise obtained at 50 Kv and 20 mAs, 60 kV and 10 mAs gave a significance value of 0.263 and 0.435, while at 70 kV and 10 mAs with Sig. (1-tailed) of .000 which means the relationship between kV to noise is strong because the sig value is below 0.05.
Backgroud:One of the most frequent radiological examinations is the child's thorax. Children have high organ sensitivity to radiation because their organs are not yet mature. The purpose of this study was to determine the radiation dose received by children during the examination of the thorax at Instalasi Radiology Rumah Sakit Paru dr. Ario Wirawan Salatiga. Methods:This research is a quantitative research with the observational approach. Research done by mounting the chip TLD in the body of the child, samples used is 10 pediatric patients 1-15 years. Then the radiation dose compared to the dose limit values recommended by UNSCEAR, for children aged 1-4 years the safe dose limit of 0.03 mGy, children 5-9 years 0.04 mGy, and for children 10-15 years 0.05 mGy. Results: Results of measurement of radiation absorbed dose for children 1-4 years old highest by 0.116 mGy and the lowest was 0.044 mGy. For children 5-9 years the highest absorbed dose of 0.130 mGy and the lowest was 0.036 mGy, while for children 10-15 years acceptable dose of 0.043 mGy. Conclusion:Results of measurement of radiation dose in Instalasi Radiology Rumah Sakit Paru dr. Ario Wirawan Salatiga is then compared with the recommendations issued by UNSCEAR (2000) in children 1-4 years absorbed dose received exceeds the allowed limit (0.03 mGy) for receiving the average absorbed a dose of 0.085 mGy. In children 5-9 years absorbed dose received also exceeded the allowed limit (0.04 mGy) for receiving absorbed dose by an average of 0.092 mGy, while the absorbed dose in children 10-15 years who received still within safe limits (0.05 mGy) for receiving a dose of 0.043 mGy.
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