A New Sector Imaging Algorithm Using Circular Array

Abstract

Pulsed-echo ultrasound sector imaging is an important technique especially when the angular field of view is limited, for example imaging heart through the ribcages in medical application. Traditional techniques for sector imaging employ focused beam scanning ( mechanically or electronically ) in which the image resolution is limited by the focusing properties of the transducer, especially for the big deflection angles. On the other hand, the beam focusing technique can not achieve uniform lateral resolution along the propagation direction even if the so-called multifocusing technique is used. The high cost for the accuracy of the transducer and the complexity of the system is a big concern for popular applications.