The scaling method applied to beta particle line sources with a finite diameter | Zendy

Schaart Dennis R. | Zendy

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The scaling method applied to beta particle line sources with a finite diameter

Author(s) -

Schaart Dennis R.

Publication year - 2002

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 - 10.1118/1.1513567

Subject(s) - scaling , line source , beta (programming language) , planar , physics , particle (ecology) , range (aeronautics) , line (geometry) , computational physics , optics , mathematical analysis , mechanics , mathematics , geometry , materials science , computer science , oceanography , computer graphics (images) , composite material , programming language , geology

The well‐known scaling method for planar and punctiform beta particle sources is extended to the case of a cylindrical source with a length larger than the beta particle range times two and with an infinitesimal or finite diameter. The equation for a spherical source with a finite diameter is also given. As a means of illustration, previously measured and simulated radial depth‐dose distributions of a 40‐mm‐long prototype188 W / 188 Re intravascular beta source in polymethylmethacrylate are scaled to H 2 O and compared with simulations in the latter medium. The results suggest that the scaling method is accurate to within about 3%, provided that the finite diameter of the source is taken into account.

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