A method of calibrating a geometry of an ultrasound transducer comprising a plurality of transducer elements, the method comprising: providing a first acoustic reflector spanning an area traversed by a plurality of beam paths of ultrasound waves transmitted from at least some of the transducer elements to a focal zone; causing said at least some transducer elements to transmit the ultrasound waves to the focal zone; measuring reflections of the ultrasound waves off the first acoustic reflector; and based at least in part on the measured reflections, determining optimal geometric parameters associated with said at least some transducer elements; the method further comprising: (a) analyzing the measured reflections to obtain a phase shift associated therewith; and computing a phase difference between the phase shift and an estimated phase value, wherein the optimal geometric parameters are determined based at least in part on the computed phase difference; or (b) computing a time of flight of the ultrasound waves from a time when the ultrasound waves are transmitted from the transducer elements to a time when the reflections are measured; or (c) modulating an ultrasound frequency of the transmitted waves; and determining the geometric parameters associated with said at least some transducer elements based at least in part on the reflections off the first acoustic reflector. providing a first acoustic reflector spanning an area traversed by a plurality of beam paths of ultrasound waves transmitted from at least some of the transducer elements to a focal zone; causing said at least some transducer elements to transmit the ultrasound waves to the focal zone; measuring reflections of the ultrasound waves off the first acoustic reflector; and based at least in part on the measured reflections, determining optimal geometric parameters associated with said at least some transducer elements; the method further comprising: (a) analyzing the measured reflections to obtain a phase shift associated therewith; and computing a phase difference between the phase shift and an estimated phase value, wherein the optimal geometric parameters are determined based at least in part on the computed phase difference; or (b) computing a time of flight of the ultrasound waves from a time when the ultrasound waves are transmitted from the transducer elements to a time when the reflections are measured; or (c) modulating an ultrasound frequency of the transmitted waves; and determining the geometric parameters associated with said at least some transducer elements based at least in part on the reflections off the first acoustic reflector. (a) analyzing the measured reflections to obtain a phase shift associated therewith; and computing a phase difference between the phase shift and an estimated phase value, wherein the optimal geometric parameters are determined based at least in part on the computed phase difference; or (b) computing a time of flight of the ultrasound waves from a time when the ultrasound waves are transmitted from the transducer elements to a time when the reflections are measured; or (c) modulating an ultrasound frequency of the transmitted waves; and determining the geometric parameters associated with said at least some transducer elements based at least in part on the reflections off the first acoustic reflector.