Medical treatment installation having an imaging system and a therapy field transmitter for treating a subject

A medical installation for treating a region of a patient, comprising:

• imaging means for generating an image of a region to be treated of a patient;
• therapy means for generating a focused therapy field converging at a focal point for treating a pathology in said region;
• means for displacing the position of said focal point relative to said region so that said focal point of said focused therapy field is successively incident at a plurality of locations in said region during generation of said focused therapy field said therapy means being activated to generate said therapy field at each of said locations;
• and
• means interacting with said imaging means for generating at least a first indicator in said image corresponding to each of said locations of said focal point of said focused therapy field in said region at which said therapy means was active and a second indicator indicating the location at which the focal point is currently incident.