1. A method of operating an ultrasound imager to perform ultrasound scanning, comprising: receiving a first dataset representing an ultrasonic scanning of a target anatomy of a patient in a two-dimensional mode in one of a sagittal, transverse or coronal anatomical plane; generating a first two-dimensional ultrasound image of the scanned target anatomy based on the received first dataset; displaying the first two-dimensional ultrasound image of the scanned target anatomy; receiving an input defining at least an orientation of a first cut line and a second cut line on the displayed first two-dimensional ultrasound image and a correspondence between the first and second cut lines and the other of the sagittal, transverse or coronal anatomical planes that are orthogonal to the plane of the first two-dimensional ultrasound image; and thereafter, receiving a second dataset representing three-dimensional ultrasonic scanning of the target anatomy and generating and displaying ultrasound images in at least two of the sagittal, transverse and coronal anatomical planes based on (1) the three-dimensional ultrasonic scanning dataset and (2) the orientation of the first and second cut lines and their correspondence to the sagittal, transverse or coronal anatomical planes that are orthogonal to the plane of the first two-dimensional ultrasound image.