Ultrasonic image pickup device and image processing device

An ultrasonic imaging apparatus comprising:

• an ultrasound probe that transmits an ultrasonic wave to a subject and receives a ultrasonic wave from the subject;
• a position sensor attached to the ultrasound probe;
• a memory configured to store a relation of a plurality of predetermined imaging parts of a liver of the subject and a plurality of predetermined rotation angles;
• and
• at least one processor programmed to:
• generate an ultrasonograph of the liver of the subject from signals received by the ultrasound probe, and generate first volume data from the ultrasonograph and positional information of the ultrasound probe obtained from the position sensor;
• and
• receive second volume data obtained from imaging the liver of the subject by another external imaging apparatus,
• receive a selection of a predetermined imaging part from the plurality of predetermined imaging parts of the liver,
• extract first and second characteristic part data, representing a portal vein of the subject, included in each of the first volume data and the second volume data, respectively,
• refer to the relation of the plurality of predetermined imaging parts and the plurality of predetermined rotation angles, determine an amount to initially rotate the second characteristic part data in the second volume data and initially rotate the second characteristic part data in the second volume data based on the selected predetermined imaging part,
• align the initially rotated second characteristic part data in the second volume data and the first characteristic part data in the first volume data, and
• generate an image in which the first characteristic data in the first volume data and the initially rotated second characteristic data in the second volume data are superimposed in alignment.