Gynae BT 2017

Intro

Mission

Concept

Solution

Mathematical Description / Repair Function

➢ PDR brachytherapy : ➢ repair between successive pulses (hours) and during the whole fraction (hours - days) is significant

t 

n

nt   

2



1

2

e k enk k nk





  

   tn sy ny

2

  





s



PDR g

1



 2

t 



t 



ke

1



t    1 e

2ln

y

x e k  





T

 … repair rate T 1/2

21

T

1/2

… half time for repair

t … x … n …

irradiation time for each pulse

time between pulses without irradiation

. . .

number of equal pulses

2

4 6 8 Time [h]