![Show Menu](styles/mobile-menu.png)
![Page Background](./../common/page-substrates/page1399.jpg)
Inverse Square Law
2
1 2
2 1
d d I I
10
40
20
30
Dose
rate
Distance from source
The intensity of electromagnetic radiation is
inversely proportional to the square of the
distance.
For Brachytherapy implants this means the dose
distributions are non-homogenous and there is a
sleeve of high dose surrounding each source