(P18) Is Bigger Better? The effect of Cylinder Diameter on Dosimetric Coverage in Vaginal Cuff Brachytherapy

Vaginal cuff brachytherapy is a common adjuvant treatment in a variety of gynecologic malignancies. Various vaginal cylindrical applicators can be used to perform vaginal brachytherapy; however, the most common approach is to use a vaginal cylinder. As a general principle, radiation oncologists are taught to use the largest diameter that can be comfortably used. The larger the diameter, the more the vagina is thinned facilitating a better dose to the target tissues. A larger diameter also places the target further from the radiation source.

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