ABSTRACT
The choice of transducer frequency in ultrasonic reflection imaging is the result of a compromise between the resolution (lateral and axial) requirement and the acquirement of satisfactory beam penetration for the imaging of the part of interest. Lateral resolution refers to the ability to distinguish two closely spaced reflectors, which are positioned perpendicular to the axis of the ultrasound beam. Lateral resolution is most closely related to the transducer beamwidth. Axial resolution refers to the minimum reflector spacing along the axis of an ultrasonic beam that results in separate, distinguishable echoes on the display.
