Determination of Pediatric Patient Companion Dose at Thoracic X-Ray Examination

Thorax radiography examination in pediatric patients is one of the most frequent examinations because many abnormalities that occur thorax and have a high probability at children's age. Pediatric are assisted by companion from adult patient's family. Calculation measurement radiation dose received very important as they room with patient during imaging process. And no matter how small companion, there will be an opportunity for stochastic effect. The Indonesian Nuclear Energy Regulatory Agency regulation Number 4 Year 2020 on Radiation Safety Use X-Ray Machines Diagnostic Interventional Radiology, regulates companions must less than 5 mSv. This study aims to analyze relationship between exposure factor companion. TLDs used measure was placed companion's chest. calculated using Klein-Nishina formula. results show ranged 0.39 × 10-5 mSv 4.64 mSv, which much lower permissible dose.