A simple physical phantom for an intercomparison exercise on 241Am activity determination in the skull.

A simple hemispherical phantom has been designed and prepared for the EURADOS intercomparison exercise on 241Am activity determination in the skull (2011–13). The phantom consists of three parts that substitute bone and soft tissues. 241Am is deposited on the surfaces of the bone-substituting part. The design and assumed composition of phantom parts are discussed. A preparation of the voxel representation of the phantom is described. The spectrum of a real measurement of the physical phantom agrees well with the simulation. The physical phantom, and its voxel representation, is provided to the participants of the intercomparison exercise. [ABSTRACT FROM AUTHOR]