A double-curved diverging lens over the flat row-column-addressed (RCA) 2-D array can
extend its inherent rectilinear 3-D imaging field of view (FOV) to a curvilinear volume region,
which is necessary for applications such as abdominal and cardiac imaging. Two concave
lenses with radii of 12.7 and 25.4 mm were manufactured using RTV664 silicone. The
diverging properties of the lenses were evaluated based on simulations and measurements
on several phantoms. The measured FOV for both lenses in contact with tissue mimicking …

Constructing a double-curved row-columnaddressed (RCA) 2-D array or applying a
diverging lens over the flat RCA 2-D array can extend the imaging fieldof-view (FOV) to a
curvilinear volume without increasing the aperture size, which is necessary for applications,
such as abdominal and cardiac imaging. Extended FOV and low channel count of double-
curved RCA 2-D arrays make 3-D imaging possible with equipment in the price range of
conventional 2-D imaging. This paper proposes a delay-and-sum beamformation scheme …