Development of an indigenous low-cost multichannel cylinder applicator for vaginal tumors.

Brachytherapy
Harjot Kaur BajwaAmeer Ahmed

Abstract

The purpose of this study was to report our experience regarding the development of a low-cost multichannel vaginal cylinder applicator for superficial and recurrent vaginal tumors. The applicator mold was created by applying heated wax sheets in layers around a plastic tube. Interstitial stainless-steel needles were placed at equal distance around the mold surface to create multiple channels for treatment. Two plans were created using CT images for a patient with a recurrent tumor over the posterior vaginal wall for comparing single-channel and multichannel cylinder dosimetry. The doses received by the target (high risk clinical target volume) and organs at risk (OARs) were computed using dose-volume histograms. There was no significant difference in terms of the prescribed dose delivered to high risk clinical target volume between the two plans. The volume of the target receiving 150 and 200 percent (V150 and V200) dose was higher in the multichannel cylinder plan than the single-channel cylinder plan. In terms of doses to the OARs, there was no significant difference between the rectum doses (D2cc rectum). There was a significant reduction in the dose to the bladder (D2cc bladder), urethra (D0.1cc urethra), and uninvolved va...Continue Reading

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