Ultrasound system and method for providing comparision information of interest object

PURPOSE: An ultrasonic wave system and a method for providing comparison information of an interest object are provided to enable a user to easily determine the improvement degree of the interest object through treatment by comparing the ultrasonic data before treating the interest object with the ultrasonic data after treating the interest object. CONSTITUTION: An ECG(electrocardiogram) signal provider(110) generates a fine electric variation due to the contraction and relaxation of an interest object as an ECG signal. A controller(120) controls the synchronization of an ultrasonic signal by using an ECG signal provided from the ECG signal provider. An ultrasonic data obtaining unit(130) obtains the ultrasonic data by receiving an ultrasonic signal reflected from an object. A user input unit(150) receives a user instruction. A processor(160) extracts the comparison information by comparing the first ultrasonic data with the second ultrasonic data.