An ultrasonic imaging system is provided which can obtain an accurate synthesized image, even if a specimen has a surface with a large curvature. An ultrasonic imaging system may include a probe and processing circuitry. The probe may perform scan of first and second ultrasonic waves different from each other. The processing circuitry may generate a first ultrasonic image based on the first ultrasonic wave and generate a second ultrasonic image based on the second ultrasonic wave. The processing circuitry may calculate a spatial relationship based on two first ultrasonic images at two positions and two second ultrasonic images at the two positions. The processing circuitry may synthesize one of the first and second ultrasonic images at one of the two positions with the one of the first and second ultrasonic images at the other position based on the calculated relationship.
