The spot size of the display unit may be used as the design criterion of the ultrasonic visualization system. Methods to design the transducer to comply with the criterion are presented, and the performance of the scanner and the receiver are discussed. The technique is prone to artifacts caused by axial and nonaxial multiple reflections, velocity changes in tissue, and signal processing. Echograms of the pregnant uterus are used to illustrate the application of the technique.
No takes yet. Share an insight, caveat, or question.
Kossoff et al. (1968) studied this question.