Journal of Medical Physics
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Year : 2009  |  Volume : 34  |  Issue : 4  |  Page : 200-205

Different intensity extension methods and their impact on entrance dose in breast radiotherapy: A study

1 Department of Radiation Therapy, Salmaniya Medical Complex, Salmaniya, Kingdom of Bahrain; Department of Physics, Anna University, Chennai, India; *At present working in Liverpool Hospital, Liverpool, Sydney, Australia
2 Department of Radiation Therapy, Salmaniya Medical Complex, Salmaniya, Kingdom of Bahrain

Correspondence Address:
A Sankar
Liverpool Hospital, Liverpool, Sydney, Australia

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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0971-6203.56079

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In breast radiotherapy, skin flashing of treatment fields is important to account for intrafraction movements and setup errors. This study compares the two different intensity extension methods, namely, Virtual Bolus method and skin flash tool method, to provide skin flashing in intensity modulated treatment fields. The impact of these two different intensity extension methods on skin dose was studied by measuring the entrance dose of the treatment fields using semiconductor diode detectors. We found no significant difference in entrance dose due to different methods used for intensity extension. However, in the skin flash tool method, selection of appropriate parameters is important to get optimum fluence extension.

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