Advanced Physics for Brachytherapy 2018

Chapter 9.2 on TPS Commissioning

9.2.6 Influence of shields, missing tissue, and inhomogeneities (abridged)

Presently, only simple correction algorithms are applied in some TPS. The effect of these algorithms must be verified and documented.

yes

Published shielding or tissue inhomogeneity data are based on MC.

yes

Validation of these MC data should be done by comparing with measured data, such as those obtained using TLD or small ionisation chambers.

ouch!

Algorithms are under development to account for scatter conditions and tissue inhomogeneities.

yes

Validation of these algorithms should be done in a similar way to the method used for checking the shielding algorithms. ouch!

ESTRO Booklet N 0 8 (2004)