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Dosimetry
•
In contact brachytherapy (
plesiotherapy)
, the
prescription is at distance, 3-4 mm (5mm ABS)
under the skin surface. If we need to treat a deeper
tumor, an interstitial procedure is advisable
•
A PTV must be added due to small changes in
positioning every day.
•
The skin surface is receiving more than the prescribed
dose (120-140%).
•
Leipzig and Valencia applicators have a gradient of
10%/mm and Esteya 7%/mm .