Teste | Abstract: 165-1 | ||||
Abstract:Interventional Radiology (IR) is a medical specialty that utilizes ionizing radiation for diagnostic and treatments. This specialty involves techniques that assist surgical procedures using fluoroscopes, and X-ray devices that provide continuous and instantaneous images of internal tissues, optimizing surgical staff and reducing associated risks [1]. However, fluoroscopy-guided procedures can expose healthcare personnel to high levels of ionizing radiation. This study aimed to perform computer simulations using the Monte Carlo method to quantify the radiation dose received in different organs and tissues of the surgical staff involved in femoral osteosynthesis surgeries. The MCNP Monte Carlo code, version 6.2, was used for the simulations, and mesh-type computational phantoms (MRKPs) representing a 26-year-old woman (160 cm in height and 53 kg in total body mass) [2] were employed. These phantoms offer a realistic representation of human anatomy and have advantages over voxel phantoms, particularly in representing very thin or small organs and tissues below voxel resolutions [2]. The spectrum used in the simulations was generated with the SpekCalc software [3].To evaluate doses in the surgical team, scenarios were considered both with and without the use of personal (lead apron) and collective (lead curtain and lead glass attached to the fluoroscope) protective equipment made from different materials (lead, bismuth, and tungsten), all with a thickness of 0.5 mm. The simulation scenarios were modeled in 3D and converted from a polygonal mesh to a tetrahedral mesh using the POLY2TET software [4]. The MCNP code tally used was F6, which determines the energy deposition in the cell (MeV/g/source-particle). The results of this study provided an accurate assessment of the radiation doses received by the surgical team with different types of protective equipment. All equipment efficiently attenuated the energy deposition in the phantom's organs and tissues. Equipment composed of tungsten showed higher effectiveness than those composed of lead and bismuth, which did not present significant differences in their performance. Due to its high density, tungsten can provide equivalent or higher protection than lead at a smaller thickness, resulting in a lighter apron for the same level of protection, making it a viable alternative for radiological protection. The authors would like to thank HUREL Laboratory for kindly providing the virtual phantoms used in this study and the Brazilian agencies CNPq (Grants 312160/2023-2 (L.P.N), 312124/2021-0 (A.P.P), 309675/2021-9 (W.S.S) and 406303/2022-3) and FAPEMIG (Grants APQ-04215-22, APQ-01254-23 and APQ-04348-23). This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) – Finance Code 001. Keywords: Monte Carlo, fluoroscopy, Interventional Radiology |