The project presents a hardware–software co-designed compressed ultrasound imaging system for 3D imaging. Generating unique pulses and echoes through a synthetic aperture, a miniaturized system using 8 PMUT sensors on a single PCB is a 100x reduction in the number of sensors from existing systems. Coupled with a computationally efficient forward model and GPU-accelerated reconstruction, the system accurately reconstructs a sparse 1 m3 scene at 1mm resolution in minutes rather than hours.