Physics Bucharest 2017

AAA Analytical Anisotropic Algorithm Expansion of the pencil beam to reduce errors in heterogeneous media

1. Obtain depth component k d integration at each depth

2. Apply lateral component using sum of exponentials   rdk    6 1 , i i r

( d ) by lateral

1





r

i e c

i 

  ,

    rdkdk rdk r d , 



Van Esch et al. Testing of the analytical anisotropic algorithm for photon dose calculation. Med. Phys. 33:4130-4148 (2006) Slide from Dr. James Bedford ESTRO physics course, June 2017