•
Is based on the dose-rate in the
central plane
of the
treatment volume as implanted.
Paris system: Dosimetry
•
The
basal dose-rate
is the
minimum dose-rate
between a group of sources in the central plane
TRIANGLE
SQUARE
55
1
B
D
&
2
B
D
&
3
B
D
&
1
B
D
&
2
B
D
&




