Dosis absorbida
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Transcript of Dosis absorbida
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Dosis Absorbida
1 rad = 100 erg/g = 10-2 J/kg
1 Gy = 100 rad = 1 J/kg
1 Rad = 10-2 Gy
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Dosis absorbida en aire
X = dQ/dm Wair = 33.85 eV/par iónico
Wair = 33.85 J/C
e
Dair = X * Wair
e
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Dosis absorbida en un medio
Dmed = fmed * X * A
fmed = 0.873 (μen/ρ)med
(μen/ρ)air
1 MeV Agua Hueso Músculo 0.971 0.927 0.962
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Calibración de la dosis con cámara de ionización en aire X = M * Nc
Df.s. = f tejido * X * Aeq
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Calibración de la dosis con cámara de ionización en un medio
Dmed = M * Nc * W (μen) med * Am
e ( ρ )air
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Teoría de la cavidad de Bragg-Gray
Dmed = Jg * W * (s/ρ)medg
e
Stopping Power
Volumen de la cámara
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Determinación de la dosis absorbida en un medio
TG 21 AAPM Ngas : Factor calibración cavidad de gas Cámara como cavidad de Bragg-Gray Parámetros de calibración de la dosis Nx: factor de calibración de la cámara Corrección por recombinación de iones Factores de corrección de la pared Factor de corrección por reemplazo
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Determinación de la dosis absorbida en un medio
Dmed = Mλ * Nc * Cλ
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Determinación de la dosis absorbida en un medio
Dmed = ME * Nc * CE
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Determinación de la dosis absorbida en un medio
TG 51 AAPM
IAEA 277
IAEA TRS 398 PROTOCOL
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Medida de la dosis absorbida
Calorimetría
Dosimetría química
Métodos de estado sólido
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Medida de la dosis absorbida
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Medida de la dosis absorbida
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Medida de la dosis absorbida
Dosímetro de sulfato ferroso (Fricke)
Valor G
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Medida de la dosis absorbida
Dosimetría termoluminiscente ( TLD )
Dosimetría fílmica
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