A system or apparatus 2 for visually displaying and treating a treatment
volume 100 located in a human or animal body 1 is disclosed wherein the
treatment volume 100 is detected by a location finding imaging instrument
10 and displayed on a monitor 12 and a treatment instrument 20 is
preferably oriented in response to the visual display to direct a
treatment path 25 which is visually displayed superimposed onto the
treatment volume 100.