ATP Barcelona 2017

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A Simple Algorithm Check
 20 X 20 cm2 field, 18MV
 50 X 50 X 50cm3 water phantom
 200cGy to 22cm depth
 Introduce air inhomogeneities,
 1cm wide mediastinum, 2cm surface layer
 Contour correction: 1cm2 wide “ spike”
 Contour correction: 25cm2 wide “spike ”
IMRT: the State of the Art, AAPM Monograph 29 pg 449-473 (2003)