Abstract

The invention is utilized in an apparatus for imaging sections of a body by transmitting ultrasonic energy into the body and determining the characteristics of the ultrasonic energy reflected therefrom. Such an apparatus typically includes a timer for generating timing signals, an energizing/receiving device alternately operative in response to the timing signals, and a display/record device, synchronized by the timing signals, for displaying and/or receiving image-representative electronic signals from the energizing/receiving device. In accordance with the invention there is provided a portable scanning module, suitable for being hand held, which comprises fluid-tight enclosure having a scanning window formed of a flexible material. A transducer is provided for converting energy from the energizing/receiving device to periodic ultrasonic energy and for converting reflected ultrasonic energy to electrical signals, the transducer having a plurality of defined segments. A variable delay device is coupled between the segments of the transducer and the energizing/receiving device, the variable delay means being responsive to the timing signals to effect electronic focusing of signals coupled therethrough. A focusing lens is coupled to the transducer. A fluid, such as water, is contained in the enclosure in the volume between the focusing lens and the scanning window. A reflective scanner device is disposed in the fluid between the lens and the window, and driving means, synchronized with the timing signals, is provided for moving the scanner device in periodic fashion.