1. A method determining positional information about an anatomical feature within a patient's body comprising the steps of: inserting a first surgical instrument into the patient's body, the instrument having a means for transmitting an image out of the patient's body; designating an anatomical feature of interest by pointing with a second surgical instrument, one or more visual targets being on the second instrument; transmitting an image of the designated anatomical feature out of the patient's body using the first surgical instrument; determining positional information about the designated anatomical feature of interest by using image processing.