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Dosimetry for radiocolloid therapy of cystic craniopharyngiomas
Author(s) -
Leticia Rojas E.,
AlDweri Feras M. O.,
Lallena Antonio M.,
Bodineau Coral,
Galán Pedro
Publication year - 2003
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.1599653
Subject(s) - dosimetry , monte carlo method , homogeneous , physics , nuclear medicine , absorbed dose , craniopharyngioma , medical physics , medicine , radiology , mathematics , statistical physics , statistics
The dosimetry for radiocolloid therapy of cystic craniopharyngiomas is investigated. Analytical calculations based on the Loevinger and the Berger formulas 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 formulas.