introduction: brachytherapy is the use of small encapsulated radioactive sources in close vicinity of tumors. various methods are used to obtain the dose distribution around brachytherapy sources. tg-43 is a dosimetry protocol proposed by the aapm for determining dose distributions around brachytherapy sources. the goal of this study is to update this protocol for presence of bone and air inhom...

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 stu...

PURPOSE To investigate dosimetric differences among several clinical treatment planning systems (TPS) and Monte Carlo (MC) codes for brachytherapy of intraocular tumors using 125I or 103Pd plaques, and to evaluate the impact on the prescription dose of the adoption of MC codes and certain versions of a TPS (Plaque Simulator with optional modules). METHODS Three clinical brachytherapy TPS capa...

The first quality assurance process for validating dose-volume histogram data involving brachytherapy procedures in radiation therapy is presented. The process is demonstrated using both low dose-rate and high dose-rate radionuclide sources. A rectangular cuboid was contoured in five commercially available brachytherapy treatment planning systems. A single radioactive source commissioned for QA...

Since the publication of AAPM Task Group 60 report in 1999, a considerable amount of dosimetry data for the three coronary brachytherapy systems in use in the United States has been reported. A subgroup, Task Group 149, of the AAPM working group on Special Brachytherapy Modalities (Bruce Thomadsen, Chair) was charged to develop recommendations for dose calculation formalisms and the related con...

In March 2004, the recommendations of the American Association of Physicists in Medicine sAAPMd on the interstitial brachytherapy dosimetry using I and Pd were reported in Medical Physics fTG-43 Update: Rivard et al., 31, 633–674 s2004dg. These recommendations include some minor changes in the dose-calculation formalism and a major update of the dosimetry parameters for eight widely used inters...

Since publication of the 2004 update to the American Association of Physicists in Medicine (AAPM) Task Group No. 43 Report (TG-43U1), several new low-energy photon-emitting brachytherapy sources have become available. Many of these sources have satisfied the AAPM prerequisites for routine clinical use as of January 10, 2005, and are posted on the Joint AAPM/RPC Brachytherapy Seed Registry. Cons...

A robust model to directly represent output from contemporary brachytherapy calculation had been proposed and developed to make clinical implementation practicable. The model was used to minimize inherent uncertainties associated with the AAMP TG-43 formalism, with consolidation of the TG-43 parameters into new parameter to speed up computational time. Analytical computations were performed to ...

The term of brachytherapy, also known as “internal radiotherapy, sealed source radiotherapy, curietherapy or endocurietherapy” is from Greek work brachy means short distance and therapy (treatment) and also known as internal radiotherapy or sealed source radiotherapy. Brachytherapy is a special form of radiotherapy where a radioactive source is carefully placed on or inside the area to be treat...

Mesh brachytherapy is a special type of permanent implant: it uses low-energy radioactive seeds in an absorbable mesh that sutured onto the tumor bed immediately after surgical resection. This treatment offers low additional risk to patient as implant procedure carried out part resection surgery. utilizes identification through direct visual evaluation during surgery or medical imaging followin...