Radiation dose in patients submitted to x-ray diagnostic exams at an emergency hospital service

摘要

Radiographic exams for diagnostic of patients under emergence attendance situations in a hospital aredone with many radiographic parameters as established by the divergence in the biotypes of patients andequipments. The lack of standardization in the exposure parameters (radiation field size, focus-skin distance,tube potential and current-time product) and in the x-ray equipment parameters (total filtration and the targetangle) may cause large variations in the radiation doses of the exposed patients. With the aim to determine theorgan absorbed doses in such patients, two approaches were adopted in this work. The absorbed dose variationsin some organs were estimated with the PCXMC? computational software by simulating exposure conditionsthat are adopted by x-ray operators. Additionally, physical dosimetry with thermoluminescent detectors in theAlderson-Rando? phantom was done. Results showed that there is space for reducing absorbed doses to patientswithout any prejudice to the image quality of the diagnostic exam.