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Accumulated dose
a case study (2)
•
Treatment approach re-irradiation:
•
Previous irradiation (TomoTherapy):
30 x 2.13 Gy = 63.9 Gy
•
Re-irradiation (VERO):
Mediastinal:
10 x 4 Gy = 40 Gy
Right Middle Lobe:
10 x 5 Gy = 50 Gy
•
Assumption
s:
Acute toxicity for lungs and oesophagus less relevant considering gap
of 1 year.
For both oesophagus and lungs an α/β = 3 is assumed for late toxicity
Lungs: V
20
< 40%
Oesophagus: D
2%
< 68 Gy (ie maximum 10Gy with re-irradiation)
re-irradiation 2017 - D. Verellen