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Table 1 The optimization objectives used in the study

From: Accuracy of inverse treatment planning on substitute CT images derived from MR data for brain lesions

Structure Objective Weighting factor
GTV Min dose > 58 3000
PTV Min dose > 57 3000
  Max dose < 63  
Left lens Max dose < 5 1
Right lens Max dose < 5 1
Left opticus Max dose < 5 1
Right opticus Max dose < 5 1
Chiasma Max dose < 50 1
Brain stem Max dose < 60 1
Pituritary gland Max dose < 40 1
External Surrounding dose falloff: 60 to 30 Gy in 10 mm 1000