Radiation protection necessarily in medical imaging: solution by metal composite

BACKGROUND: Using ionizing radiation equipment is known one of the important assays for patient diagnosis. ‎Radiation damage to in field organs was considered as a limitation factor of medical imaging ‎issue but application of the new metal composite shield helped to solving this problem. There ‎are three radiosensitive organs including breast, thyroid and lens that their protection is ‎necessary during chest and skull-neck imaging. In this study radiation dose of sensitive organs ‎during medical imaging and effect of composite shield was presented. ‎ METHODS: In this study Bismuth micro- particles as a metal used with Silicon for making composite shield ‎for radioprotection of breast, thyroid and lens. Reduction of radiation dose in the three sensitive ‎organs recorded using Bismuth composite shield. ‎ RESULTS: The findings showed that the dose reduction with bismuth composite shield depends on the ‎scanner, exposure condition and shield design. In skull imaging eyes dose decline varied from ‎‎21% to 50%. In the case of Thyroid, the dose reductions varied from 25% to 84% and finally in ‎chest imaging showed the dose decreasing by 15% to 57% for breast. ‎ CONCLUSIONS: Comparison between the eye, the thyroid, and the breast doses in the presence of shield showed ‎that bismuth composite shield has a great potential for sensitive organ protection from radiation ‎damages.‎ KEYWORDS: Ionizing radiation, Medical imaging, Radiation protection, Bismuth composite shield