2017 Imaging for Physicists Coursebook

Margins versus amplitude

3

Mean + Bone ITV + Bone ITV + Tumour Mean + Tumour

2.5

2

1.5

1

Margin [cm]

0.5

0

0

0.5

1

1.5

2

2.5

3

Tumor Amplitude [cm]

 p  6.4 mm

2 p

2

2 p

M

 

 ( 84.0 5.2 





 84.0 )

5.2

 7.0  

Assures 80% isodose encompasses GTV 90% of time in lung