Complex insertion of any of the following kinds of interstitial brachytherapy implants not requiring surgical exposure, with image guidance, and if a radiation oncologist is in attendance during the service: (a) catheters or needles for temporary implants; (b) radioactive sources for permanent implants; (c) breast applicators, single channel and multi‑channel strut devices; including the removal of applicators, catheters or needles (Anaes.)