CPB Ljubljana 2018 course book

Paris system: forecast dosimetry

Pattern

Treated length/active length

Treated thickness /spacing

Lateral margin/spacing

Safety margin/spacing

2 lines

0.7

0.5

0.37

--

≥ 3 lines

0.7

0.6

0.37

--

Squares

0.7

1.55-1.60

--

0.27

Triangles

0.7

1.3

--

0.20

Outer margin of the treatment volume from peripheral sources