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(A) Sagittal view of the transrectal ultrasound showing the parametrial invasion (arrow) and the interstitial perineal applicator (arrowhead). The applicator is inserted up to the cranial margin of the parametrial invasion. (B) Two perineal interstitial applicators were inserted to the left of intracavitary applicators. (C) Anterior x-ray of intracavitary and interstitial applicators. Also seen is a rectal dosimeter.
