Usefulness of nanoparticles to making shield and protection of sensitive organs in chest CT scan test

Introduction: Recently, the use of nanoparticles has increased for many purpose in medicine. One of these is using the nano particles in shields structure to protect sensitive organs such as breast which placed inside the field of chest CT scan and receives high dose. The aim of this study was the use of nano Bi۲O۳ to making shield for protection breast in chest CT examination and evaluating their image quality. Method and Materials: The nano Bi۲O۳ powder was used for create shield at ۱mm thickness. The ۶-slice CT scan system and PMMA phantom were used for dose measurement. Dose measured once in present of the shield and once in absent of the shield. Also the image quality was measured. Results: Reference average dose was ۸.۶ mGy in chest CT scan test which changed to ۷.۴ mGy when Bi۲O۳ shield was placed on the phantom. Also CT number and noise were raised from ۱۲۱ HU and ۲۴ to ۱۲۶ HU and ۲۸. Conclusion: On the base of results, the Bi۲O۳ nano particles have enough potential for radiation protection and using as a shield for reducing of breast dose in CT scans with acceptable image.

کلیدواژه ها:

breast dose ، Bi۲O۳ nanoparticle ، CT Number ، Noise