A medical ultrasonic apparatus (200) comprises an ultrasonic probe； an image processing apparatus configured to generate an ultrasonic image based on the collected ultrasonic echo signals, increase a difference between adjacent frame images included in the ultrasonic image, and generate a movement-amplified image in which a movement of interest is amplified； and a display (410) configured to display the movement-amplified image. The image processing apparatus includes a weight applier configured to, when a difference between a first imaginary component of a first frame image and a second imaginary component of a second frame image, the second frame image being adjacent to the first frame image, is less than or equal to a first threshold value, apply a first weight to the second imaginary component to increase the difference； and to generate a corresponding movement-amplified image where a movement of interest corresponding to the increased difference is amplified.
