Diseño y Cálculo de blindajes para zonas de alto riesgo radiológico en la Unidad de Medicina Nuclear del Hospital Teodoro Maldonado Carbo, IESS - Guayaquil.

Abstract

The objective of this work is the design and calculation of shielding for a SPECT-CT installation in the Nuclear Medicine Unit of the Teodoro Maldonado Carbo IESS-Guayaquil. To this end, the radioprotection technical considerations applied by international organizations were taken in to account: the National Council on Radiation Protection and Measurements (NCRP) of the United in its recommendations N0. 147 and 151, in the reports The American Association of Physicians in Medicine (AAPM) in its report TG-108, the Nuclear Safety Council of Spain (CSN 5.11) and the International Atomic Energy Agency (IAEA SRS-2/1). For the calculation of shielding, a sheet programmed in MATLAB was used, taking in to account dose restrictions: occupationally exposed personnel (100 microsievert/sem) as well as the public (20 microsievert/sem). The radiopharmaceutical taken as reference was Iodine-131. The results obtained in the present investigation were the design of 30 locations, of which 11 needed shielding protection. It is concluded that the thickness of the protection barrier in lead and concrete of the 11 premises that need protection were: for concrete form 25 to 65cm and for lead from 4 to 10mm, It is recommended to carry out new shielding calculations in the protection barriers if the proposed original design is varied and Radiological Protection program is implemented in order to verify compliance with the dose limits established by the Regulatory Authority.