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Table 2 Optimization goals and constrains used for VMAT and HyperArc planning

From: Novel strategy with the automatic non-coplanar volumetric-modulated arc therapy for angiosarcoma of the scalp

Structure

Objective

Priority

VMAT

HyperArc

NTO

 

75

 

SRS NTO

  

100

PTV

D99% > 63 Gy

100

250

Dmean = 70 Gy

100

250

Dmax < 80 Gy

100

250

Brain

as low as possible

80

150

Brain stem

Dmax < 54 Gy

50

100

Chiasm

Dmax < 50 Gy

50

100

Optic nerve

Dmax < 50 Gy

50

100

Lens

Dmax < 6 Gy

150

150