Three-Dimensional Models and Complimentary Geometry for Dose Evaluation in NG-24MT Based Neutron Radiotherapy Cabinet
The neutron radiation shielding problem is a comprehensive challenge which requires the strong mathematical methodology and physics background. The current work proposes neutron and residual gamma fields’ estimation inside the three-dimensional model of the radiotherapy canyon together with allocated equipment. The canyon geometrical model and conformal barrier shielding implemented as complimentary grid cell layer. The results contain the Monte-Carlo based dose calculation for NG-24MT portable neutron generator realistic model. The absorbed dose estimated both during the irradiation process as well as after generator shutdown taking into account induced radioactivity inside the walls and the facility elements from stainless steel and tungsten composite. These values assessed inside the canyon and outside on the operator and medical stuff working site. The key elements of the facility structure are the gantry system, the movable positioner system, the collimation system and the neutron generator itself. Some innovative engineering solutions were proposed, including but not limited to the wall geometry and material. All the resulted estimated values show the acceptable dose rate level for A-group of personnel on their workplaces and entering the canyon after the required time gate tolerance. Overall, the research and development stage is an essential and crucial component of project design and engineering, and the radiation hygiene properties are pivotal for successful implementation of radiation treatment procedures planned on this machine. Overall, the fast neutron therapy offers its technological advances while its noteworthy biological efficiency serves the higher tumor kill probability, providing the improved patients’ survival and higher quality of life.
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Link for citing the article: Chernukha A.E., Saburov V.O., Adarova A.I., Solovev A.N., Kizilova Yu.V., Koryakin S.N. Three-Dimensional Models and Complimentary Geometry for Dose Evaluation in NG-24MT Based Neutron Radiotherapy Cabinet. Izvestiya vuzov. Yadernaya Energetika. 2022, no. 3, pp. 158-167; DOI: https://doi.org/10.26583/npe.2022.3.14 (in Russian).