SBRT2015

Treatment Planning

• Type B dose calculation algorithm • For details on plan acceptance see lecture Tuesday

• Treatment constraints: ! PTV = GTV + 5mm ! Dose prescription # Centrally located lesions #

4 x 12 Gy (Monte Carlo) 3 x 17 Gy (Monte Carlo)

Lesions < 1cm from thoracic wall

Peripheral lesions

#

Dose prescription #

!

Normalization: 100% @ isocentre , D 1%

< 105%

# 95% of PTV covered by prescription isodose surface (i.e. 12 or 17Gy) # 99% of PTV covered by 90% of prescription isodose surface ! Dose constraints: # Conformity, low and high dose spillage … # Normal tissues … Pencil Beam versus Monte Carlo Dose Calculation SBRT 2015 - D. Verellen

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