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Evaluación de métodos de monte carlo de equipos de mamografía digital del programa de cribado de la comunidad valenciana.

El cribado mamográfico o screening consiste en la exposición sistemática y organizada de mujeres asintomáticas a mamografía, con el fin de detectar precozmente cualquier enfermedad en sus primeras etapas. sin embargo, la exposición de la mama a la radiación ionizante de un equipo mamográfico supone un riesgo para la salud de las mujeres estudiadas que es necesario estimar y controlar. los métodos de monte carlo se utilizan en el transporte de radiación para estimar magnitudes dosimétricas, como la dosis absorbida, que está relacionada con el riesgo de exposición. se ha modelado un equipo de mamografía mediante el código de monte carlo mcnp5 para la estimación de la dosis media glandular absorbida en la mama a través de medidas físicas del kerma en aire en la superficie de entrada (kase) durante controles de calidad. se han utilizado diferentes registros dosimétricos o tallies, como las f2, f4 y f5, aplicando diferentes técnicas de reducción de varianza (trv). a partir de las dosis medias calculadas, se estimó el riesgo radiológico en el programa de cribado mamográfico de la comunidad valenciana mediante un modelo de riesgo multiplicativo derivado de procesos de markov, considerando diferentes estudios de control: life span study, los estudios de fluoroscopia de canadá y massachussets y los tratamientos de enfermedades benignas de mama en suecia, entre otros. el estudio se aplicó a diferentes equipos de mamografía digital (cr y dr) implantados en el programa de cribado, para la evaluación de calidad de las diferentes tecnologías en lo que respecta a la dosis glandular absorbida. el detrimento radiológico medio ha sido inferior a 9 10-5 cánceres de mama inducidos en mujeres-año, entre todos los estudios de incidencia y mortalidad, e inferior a 6 10-5 cánceres mortales, mientras que para el caso de mamografía digital, la incidencia es inferior a 1.3 10-4 y la mortalidad a 8 10-5. los riesgos radiológicos son mayores en las muestras poblacionales de equipos digitales po


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