Abstract: An ultrasound diagnostic system includes a plurality of elements arranged around a test object and emitting and receiving ultrasound, a control unit controlling such that at least one of the elements emits ultrasound and at least some of the elements receive scattered waves, a collection unit collecting measurement data obtained from the elements, a calculation unit that calculates, for a plurality of division regions into which an imaging region is divided, a scattered sound pressure intensity of each division region based on a first factor and a second factor of the division region, the first factor being constituted by arrival times which are each a period from emission to reception of ultrasound that is emitted from a predetermined element, scattered by the test object in the division region, and received by a corresponding one of the plurality of elements, and an image generation unit that generates a scattering image.