Comparison of conventional vs. software-based methods for rapid arc SRS QA

Journal of Bioengineering & Biomedical Science

ISSN: 2155-9538

Open Access

Comparison of conventional vs. software-based methods for rapid arc SRS QA

3rd International Conference on Medical Physics & Biomedical Engineering

November 07-08, 2016 Barcelona, Spain

Amirali Etemadnia

Vantage Oncology Center for Radiation Therapy of Beverly Hills, USA

Posters & Accepted Abstracts: J Bioengineer & Biomedical Sci

Abstract :

Aim of this study is to evaluate a SRS rapid arc QA method using the portal dosemeter as a viable QA tool and comparison of its results to the conventional physicâ??s QA methods, the film and ion chamber measurements. Both absolute and relative QAsâ?? results have been studied in this study. Ion chambers have a high dependancy on their setup and more specifically on their placement within the radiation field. Large variations in their readings can stem from a minute setup deviation. This is especially accentuated in the case of a the high dose gradient areas of a small field SRS field. The results are very dependant on this placment accuracy. On the other hand, the outcome is limited to one absolute measurement data per placement. The same can be said about film dosimetry and its own uncertainties such as developer conditions, film batch and the film development procedure as a whole. Similar to the ion chamber setup, one can expect one relative measurement data out of each film setup. We are presenting a portal dosimetry based QA tool that will not have similar uncertainties but on the other hand, produces range of measurment data per exposue, based on acctual delivery plan not hypothetical results. We are comparing its performance to the conventional methods of the ion chamber and film based measurements.

Biography :


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