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Updated: Aug 25, 2026

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification (ADCI) and Dose Estimation
Published on: September 4, 2017
Determination of 137Cs dosimetry parameters according to the AAPM TG-43 formalism
Lizhong Liu1, Satish C Prasad, Daniel A Bassano
1Department of Radiation Oncology, SUNY Upstate Medical University, 750 East Adams Street, Syracuse, New York 13210, USA. liul@upstate.edu
Abstract:
Traditional treatment planning systems calculate dose distributions around 137Cs intracavitary sources by interpolating stored dose rate tables or by Sievert-type integrals. Some of the recently introduced planning systems, such as the Varian BrachyVision and Eclipse (Varian Medical Systems, Palo Alto, CA), have discontinued the use of tables and have implemented instead the AAPM TG-43 formalism as a brachytherapy dosimetry calculation algorithm. In this work we present the dosimetry parameters for 137Cs intracavitary sources as determined according to the TG-43 formalism. With the availability of the TG-43 parameters, the commissioning of a 137Cs source in any current brachytherapy planning system is a straightforward task for a clinical physicist.
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