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Background: Using of Digital Radiography to radiate the chest of pediatric patients, radiologist has to know how to set the appropriate technical value. The measurement of radiation dose receiving by pediatric patients by radiographing using digital radiography has not been conducted yet. Therefore, to reduce the radiation dose receiving by pediatric patients when taking a quality X-ray film, we measured the radiation dose receiving by pediatric patients using DR system of radiologydepartment, Buriram Hospital.
Objective: To detect and measure the radiation dose containing in pediatric patient’s skin obtained by radiographing using digital radiography at Buriram Hospital.
Study site: Radiology Department, Buriram Hospital
Sample: Two hundred Pediatric patients age ranking from 0 to 15 years receiving the radiography at radiology department, Buriram Hospital during January to March 2018 were included in the present study.
Methods: The observational study was employed and the samples who receiving the chest AP supine and chest PA upright using DR system were divided into 4 groups based on their age including age ranking from 0-1 year, 1-5 years, 5-10 years and 11-15 years. Patient’s information such as gender and age and technical value such as kVp, mA and sec were collected. Theentrance skin dose was measure using formula. The data were analyzed using ESD = Y(d) x mAs x [ ]2x BSF SPSS version22.
Results: Of 200 pediatric patients, 57% were male and 43% were female. The means and standard deviation of chest thickness. 8.47 (SD = 0.95), 10.82 (SD = 0.69), 12.73 (SD = 0.81), 15.39 (SD = 0.93), respectively. The means of technical value for chest AP supine and chest PA upright were 55 kVp, 1.23 mAs, 64.89kVp, 1.74 mAs, 75 kVp,2.4 mAs,75 kVp,2.6 mAs, respectively. The focal film distance (FFD) of patient age ranking 0-1 year and 1-5 years who could not stand was 100 cm and 180 for patients who could stand. The FFD of pediatric patients age ranking from 5-15 years was 180 cm. The means of radiation dose of patient age ranking from 0-1 and 1-5 years was 0.07 mGy(SD=0.01) The means of radiation dose of patient age ranking from 5-10 years was 0.06mGy (SD=0). For pediatric patient age ranking from 11-15, the mean of radiation dose was measured at level of 0.07 (SD=0).
Conclusions: In conclusion, the mean of radiation dose receiving by patients age ranking from 0-1 and 1-5 years was higher than 5-10 and 11-15 years. The technical value was associated with the chest size and age. The smaller patients who could not stand were taken the radiography by chest AP supine and they have received the radiation dose higher than the older pediatric patient.
Keywords: Entrance skin dose, Chest X-ray
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