Ultrasound volume data forming apparatus and ultrasound volume data forming program

A non-transitory computer-readable storage medium storing an ultrasound volume data forming program causing a computer to:

• acquire a frame data sequence acquired by sweeping an ultrasound probe that scans an ultrasound beam on a subject, in a direction perpendicular to a scanning plane of the ultrasound beam, the frame data sequence including each piece of frame data having a data element sequence, two-dimensionally arranged in accordance with the scanning plane, indicating a signal intensity of a reflected wave from the subject,
• in which position and posture information indicating a perpendicular plane position, which is a position of the ultrasound probe when a piece of the frame data in a plane perpendicular to a sweep direction is acquired, and a posture of the ultrasound probe when the piece of the frame data is acquired is associated with each piece of the frame data included in the frame data sequence;
• and
• form ultrasound volume data by arranging the frame data sequence in an arrangement direction that is a direction perpendicular to a two-dimensional array direction of the data element sequence in a data space, wherein the ultrasound volume data is formed by changing at least one of a perpendicular plane position, which is a position in a plane perpendicular to the arrangement direction, or a posture of each piece of the frame data included in the frame data sequence in accordance with the position and posture information associated with the piece of frame data without changing the position and the posture of the ultrasound probe, and then arranging the pieces of the frame data in the arrangement direction.