MONTE CARLO SIMULATIONS TO EXPLORE THE POSSIBLE USE

OF 144Ce FOR BRACHYTHERAPY APPLICATIONS

V. O. Zilio1*, O. P. Joneja1,2, Y. Popowski3, R. Chawla1,2

1 Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

2 Paul Scherrer Institute, CH-5232 Villigen, Switzerland

3 Division de Radio-Oncologie, Hôpital Universitaire de Genève, 1211 Genève, Switzerland

* Corresponding author. E-mail : valery-olivier.zilio@epfl.ch

Received : 15 February 2003; revised version accepted :19 April 2005

Abstract

Several sources are commercially available for brachytherapy; research for an ideal source is still continuing. The present paper investigates the characteristics of a new candidate source, 144Ce / 144Pr, in a adequate containment. Monte Carlo dosimetric results of the source are compared with the most commonly used radio-isotopes for brachytherapy, viz. 192Ir, 90Sr / 90Y and 32P. The dosimetric contributions of gamma and beta radiation were calculated separately for 144Ce / 144Pr and 192Ir. From the comparative studies and the basic properties of 144Ce / 144Pr, i.e. half-life and specific activity, it is evident that this source should be considered as a serious candidate for future brachytherapy applications.

Keywords: 144Ce; Brachytherapy; Spring source; Monte Carlo calculation.

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