Ultrasound imaging apparatus and operating method for the same

An ultrasound imaging apparatus configured to irradiate ultrasonic waves to an object to which a contrast agent is administered, receive an echo signal reflected from the object, and analyze a contrast enhanced ultrasound image for the object,

• the ultrasound imaging apparatus comprising:
• a display;
• and
• an image processor,
• wherein the image processor is configured to:
• set a region of interest in an ultrasound image of the object to which a contrast agent is administered;
• generate a time intensity curve representing brightness of each frame of the ultrasound image within the set region of interest;
• and
• generate a curve fitting model representing a tendency of the time intensity curve by determining parameter values of a first function and a second function, wherein the curve fitting model is a predetermined mathematical model combining the first function representing a vascular phase and the second function representing a Kupffer phase following the vascular phase,
• and wherein the display is configured to display a graph of the second function representing the Kupffer phase of the object,
• wherein the contrast agent is a Sonazoid contrast agent.