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Sumario Resumen - GRADO SUPERIOR DE RADIOTERAPIA Y DOSIMETRIA

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Resumen - GRADO SUPERIOR DE RADIOTERAPIA Y DOSIMETRIA

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August 11, 2024
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2021/2022
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Dosimetría Física y Clínica


FÓRMULAS

1. TÉCNICA ISOCÉNTRICA



DFPC = Distancia fuente punto de cálculo




Sc = Factor de colimador
Sp = Factor de maniquí


2. DISTANCIA FUENTE SUPERFICIE FIJA




3. ELECTRONES
Estos tratamientos se realizan a la distancia fuente-isocentro (DFS=100cm), y se recomienda no utilizar otra
distancia a no ser que sea estrictamente necesario.




Factor de aplicador: Sapl Factor de campo: Scp (factor de bloque)


En caso de utilizar una distancia distinta a la de referencia hay que tener en cuenta que la tasa de dosis no
disminuye de acuerdo con la ley del inverso del cuadrado de la distancia como en el caso de los fotones. En
este caso se determinar experimentalmente la posición de la denominada fuente virtual, punto desde donde
se cumple la ley del inverso del cuadrado de la distancia, que podrá estar más cerca o más lejos del isocentro
que el foco real de radiación.




fv =distancia del isocentro a la
fuente virtual
f =distancia fuente virtual-piel
Factor de aplicador: Sapl Factor de campo: Scp (factor de bloque)



4. RELACION PDD (20,10) Y TPR (20,10) 5. DOSIS ABSORBIDA (TRS-398)
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