Implant geometry and detection rates of prostate fiducial markers after transrectal ultrasound-guided perineal implantation for image-guided 6D-tracking in robotic stereotactic body radiotherapy

Transperineal intraprostatic FM implantation is a safe procedure. We recommend the use of double markers for reduction of trauma (two punctures instead of four) and, hence, increased patient comfort. Double FM were significantly predictive for achieving an optimal implantation geometry, which was borderline significant for improved marker detection rates over the course of the five-fraction treatment.