1. A method for creating an ultrasonic scan comprising the following steps: (a) providing an ultrasonic transducer comprising an imaging transducer array and a tracking transducer array, said tracking transducer array comprising a plurality of transducer elements; (b) applying a respective transmit signal to each of the transducer elements, each transmit signal comprising a plurality of cycles characterized by a frequency; and (c) varying the frequency to selectively control an associated ultrasonic scan direction from the tracking transducer array.