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IMSure: el modelo de las 3 fuentes

    Fuente de fotones
     primaria
    Dispersión del filtro
     aplanador
    Dispersión de los
     colimadores principales


          Estas 3 fuentes suponen el 98% de la dispersión
           de dosis
IMSure para QA de IMRT:
                                                        resultados clínicos
                      35
                                                                                                           40
                                Our calculation
                      30                                                                                                  Our calculation
                                Corvus calculation
                                                                                                           35             Corvus calculation
                                The measurements
                                                                                                                          The Measurements
                      25                                                                                   30
Absolute Dose (cGy)




                                                                                     absolute Dose (cGy)
                      20                                                                                   25

                                                                                                           20
                      15

                                                                                                           15
                      10
                                                                                                           10
                      5
                                                                                                           5

                      0
                           -8   -6      -4      -2     0      2       4    6     8                         0
                                                                                                                -8   -6      -4      -2        0   2       4   6   8
                                             Off-Axis Distance (cm)                                                               Off-Axis Distance (cm)

                                      Campo abierto uniforme                                                                      Campo en cuña

                                                            Yang Y, et al. Med Phys. 2003 Nov 30(11):2937-47
IMSure para QA de IMRT
   Rápido QA de la
    IMRT y comparación
    con el TPS


    QA de Paciente: IMSure
    puede ser comparado a los
    planes de tratamiento del
    paciente; sin embargo los
    datos medidos deben ser
    comparados al plan del
    fantoma usado
                                2 horas de QA reducidas
                                     a 5 minutos…
IMSure: verificación independiente y
  comparación de fluencias y mapas de dosis
               Secuencia   Mapa de             Mapa de
               de las      fluencias           fluencias
               láminas     del TPS             recalculado
               de R&V
                                               por IMSure




  Mapa de
 fluencias
mostrando la
 diferencia                   Resultados cuantitativos
5 comparaciones diferentes entre IMSure y el TPS
         para un preciso QA de IMRT

    1. Mapas de diferencia

    2. Mapas Gamma

    3. Coeficiente de Correlación Patententado

    4. Diferencia Máxima %

    5. Comparación de mapas de dosis

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ImSure de Standard Imaging

  • 1.
  • 2. IMSure: el modelo de las 3 fuentes  Fuente de fotones primaria  Dispersión del filtro aplanador  Dispersión de los colimadores principales  Estas 3 fuentes suponen el 98% de la dispersión de dosis
  • 3. IMSure para QA de IMRT: resultados clínicos 35 40 Our calculation 30 Our calculation Corvus calculation 35 Corvus calculation The measurements The Measurements 25 30 Absolute Dose (cGy) absolute Dose (cGy) 20 25 20 15 15 10 10 5 5 0 -8 -6 -4 -2 0 2 4 6 8 0 -8 -6 -4 -2 0 2 4 6 8 Off-Axis Distance (cm) Off-Axis Distance (cm) Campo abierto uniforme Campo en cuña Yang Y, et al. Med Phys. 2003 Nov 30(11):2937-47
  • 4. IMSure para QA de IMRT  Rápido QA de la IMRT y comparación con el TPS  QA de Paciente: IMSure puede ser comparado a los planes de tratamiento del paciente; sin embargo los datos medidos deben ser comparados al plan del fantoma usado 2 horas de QA reducidas a 5 minutos…
  • 5. IMSure: verificación independiente y comparación de fluencias y mapas de dosis Secuencia Mapa de Mapa de de las fluencias fluencias láminas del TPS recalculado de R&V por IMSure Mapa de fluencias mostrando la diferencia Resultados cuantitativos
  • 6. 5 comparaciones diferentes entre IMSure y el TPS para un preciso QA de IMRT  1. Mapas de diferencia  2. Mapas Gamma  3. Coeficiente de Correlación Patententado  4. Diferencia Máxima %  5. Comparación de mapas de dosis