Dosimetry for radiocolloid therapy of cystic craniopharyngiomas

Details Dosimetry for radiocolloid therapy of cystic craniopharyngiomas Dosimetry for radiocolloid therapy of cystic craniopharyngiomas

2003-10-30

arxiv.org/abs/physics/0310150v1

Medical Physics 30 (2003) 2482-2492

Physics

Medical Physics

15 pages, 6 Tables, 9 Figures

Scientific paper

The dosimetry for radiocolloid therapy of cystic craniopharyngiomas is investigated. Analytical calculations based on the Loevinger and the Berger formulae for electrons and photons, respectively, are compared with Monte Carlo simulations. The role of the material of which the colloid introduced inside the craniopharyngioma is made of as well as that forming the cyst wall is analyzed. It is found that the analytical approaches provide a very good description of the simulated data in the conditions where they can be applied (i.e., in the case of a uniform and infinite homogeneous medium). However, the consideration of the different materials and interfaces produces a strong reduction of the dose delivered to the cyst wall in relation to that predicted by the Loevinger and the Berger formulae.

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