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Developing a treatment planning software based on TG-43U1 formalism for Cs-137 LDR brachytherapy
Joint Authors
Siavashpour, Zahra
Sina, Sedigheh
Faghihi, Rida
Meigooni, Ali Sulaymani
Shirazi, Muhammad Amin Muslih
Source
Iranian Red Crescent Medical Journal
Issue
Vol. 15, Issue 8 (31 Aug. 2013)18 p.
Publisher
Publication Date
2013-08-31
Country of Publication
United Arab Emirates
No. of Pages
18
Main Subjects
Abstract EN
Background : the old Treatment Planning Systems (TPSs) used for intracavitary brachytherapy with Cs-137 Selectron source utilize traditional dose calculation methods, considering each source as a point source.
Using such methods introduces significant errors in dose estimation.
As of 1995, TG-43 is used as the main dose calculation formalism in treatment TPSs.
Objectives : the purpose of this study is to design and establish a treatment planning software for Cs-137 Solectron brachytherapy source, based on TG-43U1 formalism by applying the effects of the applicator and dummy spacers.
Materials and Methods : Two soft wares used for treatment planning of Cs-137 sources in Iran (STPS and PLATO), are based on old formalisms.
The purpose of this work is to establish and develop a TPS for Selectron source based on TG-43 formalism.
In this planning system, the dosimetry parameters of each pellet in different places inside applicators were obtained by MCNP4c code.
Then the dose distribution around every combination of active and inactive pellets was obtained by summing the doses.
The accuracy of this algorithm was checked by comparing its results for special combination of active and inactive pellets with MC simulations.
Finally, the uncertainty of old dose calculation formalism was investigated by comparing the results of STPS and PLATO soft wares with those obtained by the new algorithm Results : for a typical arrangement of 10 active pellets in the applicator, the percentage difference between doses obtained by the new algorithm at 1cm distance from the tip of the applicator and those obtained by old formalisms is about 30 %, while the difference between the results of MCNP and the new algorithm is less than 5 %.
Conclusions : According to the results, the old dosimetry formalisms, overestimate the dose especially towards the applicator’s tip.
While the TG-43U1 based software perform the calculations more accurately.
American Psychological Association (APA)
Sina, Sedigheh& Faghihi, Rida& Meigooni, Ali Sulaymani& Siavashpour, Zahra& Shirazi, Muhammad Amin Muslih. 2013. Developing a treatment planning software based on TG-43U1 formalism for Cs-137 LDR brachytherapy. Iranian Red Crescent Medical Journal،Vol. 15, no. 8.
https://search.emarefa.net/detail/BIM-334411
Modern Language Association (MLA)
Sina, Sedigheh…[et al.]. Developing a treatment planning software based on TG-43U1 formalism for Cs-137 LDR brachytherapy. Iranian Red Crescent Medical Journal Vol. 15, no. 8 (Aug. 2013).
https://search.emarefa.net/detail/BIM-334411
American Medical Association (AMA)
Sina, Sedigheh& Faghihi, Rida& Meigooni, Ali Sulaymani& Siavashpour, Zahra& Shirazi, Muhammad Amin Muslih. Developing a treatment planning software based on TG-43U1 formalism for Cs-137 LDR brachytherapy. Iranian Red Crescent Medical Journal. 2013. Vol. 15, no. 8.
https://search.emarefa.net/detail/BIM-334411
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-334411