A device for ultrasound-assisted reflection and transmission tomography includes a measurement volume filled with an ultrasonic coupling medium and having an opening for inserting a body to be examined and a lateral surface remote from the opening, and a number of ultrasonic transducers arranged remotely from the opening of the measurement volume, arranged in direct contact with the ultrasonic coupling medium, and arranged oriented into the measurement volume. The arrangement of the ultrasonic transducers around the measurement volume aperiodically follows a random uniform distribution.