Researchers have developed a low-voltage-driven mems ultrasonic phased-array transducer for fast 3d volumetric imaging. The technology appears to be related to various advancements in ultrasound imaging, including high-uniformity miniaturized arrays and all-optically controlled phased-arrays. The applications of these developments may include wearable ultrasound imaging, ultrasonic flowmeters, and versatile single-element ultrasound imaging platforms for both animals and humans.