A method for imaging a volume within a patient is provided. The method includes generating an ultrasonic signal at a first selected frequency, using a first transducer located within the tissue structure directing the ultrasonic signal on a spot in the volume within the patient scanning the spot in a predetermined pattern about the wall of the volume within the patient receiving an ultrasonic echo in a second transducer at a second selected frequency converting the ultrasonic echo into a voltage amplifying the voltage with a processing circuit and providing an image of the volume within the patient from the voltage. In some embodiments, the method may include classifying the image according to a characterization tool and providing a plurality of images of the volume from the voltage.
