1. A method for ultrasonically scanning a volumetric region by means of a scanhead including a two dimensional array of transducer elements coupled to an ultrasonic imaging system comprising: acquiring a plurality of scanlines from the volumetric region comprising at least a portion of a scanline pattern which, when viewed axially along the scanlines, is hexagonal in shape; and interpolating two or more of the plurality of scanlines to increase the scanline density of the hexagonal pattern.