METHOD AND APPARATUS FOR ULTRASONIC DETECTION OF MOTION USING ADJUSTABLE FLUID LENSES

摘要

A system (200) for detection of motion in a body includes an acoustic probe (242, 100), a motion detection processor (270), a variable voltage supply (290), and a controller (210). The acoustic probe (242, 100) includes an acoustic transducer (244, 20), and a variably-refracting acoustic lens (242, 10) coupled to the acoustic transducer. The variably-refracting acoustic lens has at least a pair of electrodes (150, 160a, 160b) adapted to adjust at least one characteristic of the variably-refracting acoustic lens in response to a selected voltage applied across the electrodes. The motion detection processor is coupled to the acoustic transducer and executes an algorithm to detect motion of an object in response to acoustic energy received by the acoustic transducer. The variable voltage supply applies selected voltages to the pair of electrodes. The controller controls the variable voltage supply to apply the selected voltages to the pair of electrodes.