TY - JOUR ID - 7081 TI - Dose Reduction to the Thyroid Gland in Pediatric Chest Radiography JO - International Journal of Pediatrics JA - IJP LA - en SN - 2345-5047 AU - Karami, Vahid AU - Zabihzadeh, Mansour AU - Gholami, Mehrdad AU - Shams, Nasim AU - Fazeli Nezhad, Zahra AD - Medical Physics Student (MSc), Department of Medical Physics, Student Research Committee, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. AD - Assistant Professor, Department of Medical Physics, School of Medicine, Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. AD - Assistant Professor, Department of Medical Physics, Lorestan University of Medical Sciences, Khorram Abad, Iran. AD - Assistant Professor (PhD), Department of Oral and Maxillofacial radiology, School of dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran AD - Radiologist, Department of Radiology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. Y1 - 2016 PY - 2016 VL - 4 IS - 7 SP - 2183 EP - 2191 KW - Pediatric chest radiography KW - Radiation Exposure KW - Shield KW - Thyroid gland DO - 10.22038/ijp.2016.7081 N2 - Background  It is remain a main concern that pediatric chest radiographies contribute to the significant radiation exposure to the thyroid gland as a more susceptible organ to radiation induced cancer. The aim of this study was to evaluate the entrance surface dose (ESD) of pediatric chest radiography compared to the diagnostic reference levels (DRL) and evaluation the efficacy of the lead (Pb) shield in radiation dose reduction to the thyroid gland.Materials and Methods After assessing each patient against specific inclusion-exclusion criteria, 40 pediatric patients who were undergoing anterior-posterior (AP) projection of the chest x-ray were considered eligible for this study. The ESD of the chest and also ESD of thyroid gland with and without a 1 mm butterfly-shaped lead shield which placed on the thyroid gland were measured using high sensitive thermo luminescent dosimeters (TLD-GR 200).Results The average of ESD for chest radiography was 0.068+ 0.006 mGy (0.021 - 0.232 mGy). The unshielded average thyroid ESD was 0.065 + 0.003 mGy compared to the shielded average thyroid ESD of 0.001 + 0.0005 mGy. The use of Pb-shield produced a statistically significant decrease in the average thyroid dose by about 97% (P< 0.001). Conclusion The use of Pb-thyroid shield in the AP projection of pediatric chest radiography has potential to reduced radiation dose without compromising image quality. UR - https://ijp.mums.ac.ir/article_7081.html L1 - https://ijp.mums.ac.ir/article_7081_b6dbe47be642f9b0b516650c9a73ec92.pdf ER -