Advanced Physics for Brachytherapy 2018

3. real sources

Input must now be source specific: • Energy distribution of primary fluence (in essence the source phase space file)

Acuros uses effective sources: pre-calculated source specific phase space file + a number of points within the source volume for ray tracing the primary fluence in the geometry

Brachy sources are small BUT the number of point sources used for ray tracing can be important

Figure from: L. Petrokokkinos et al. Med. Phys. 38 1981 (2011)