1. An ultrasound system comprising: an ultrasound probe configured to acquire ultrasound data of an object; a processor module configured to process the acquired ultrasound data for display, and a display responsive to the processor module to display a three-dimensional (3D) ultrasound image volume based on the ultrasound data and a 3D graphical representation of the ultrasound probe in combination with the ultrasound image showing a position of the 3D graphical representation of the ultrasound probe at the displayed 3D ultrasound image volume corresponding to a 3D position of the ultrasound probe relative to the 3-D ultrasound image volume of the imaged object.