Embodiments for providing at least one slice image based on at least three points are disclosed. In one embodiment, by way of non-limiting example, an ultrasound system (100) comprises: an ultrasound data acquisition unit (110) configured to transmit and receive ultrasound signals to and from a target object to output ultrasound data a user input unit (120) configured to receive input information for setting at least three points on a three-dimensional ultrasound image from a user and a processing unit (130) in communication with the ultrasound data acquisition unit and the user input unit, the processing unit being configured to form volume data based on the ultrasound data, render the volume data to form the three-dimensional ultrasound image, set the at least three points on the three-dimensional ultrasound image based on the input information, set at least one slice on the three-dimensional ultrasound image based on the at least three points and form at least one slice image corresponding to the at least one slice.
