Ultrasound diagnostic apparatus and control method of ultrasound diagnostic apparatus

A control method of an ultrasound diagnostic apparatus, the control method comprising:

• acquiring a plurality of ultrasound images in which a breast of a subject is captured;
• determining a malignancy value in each of a plurality of portions in a region of interest of the breast of the subject in the plurality of ultrasound images by analyzing the plurality of ultrasound images;
• calculating a malignancy threshold value by multiplying a predetermined ratio to a maximum value of the malignancy values;
• detecting a region in which the malignancy value is greater than or equal to the malignancy threshold value as a sampling target region in which a tissue is sampled from the subject by a tissue sampling needle based on each of the plurality of ultrasound images;
• calculating a recommended path of the tissue sampling needle passing through the sampling target region;
• displaying the plurality of ultrasound images sequentially on a monitor;
• displaying the recommended path superimposed on each of the plurality of ultrasound images on the monitor;
• detecting a location of a distal end of the tissue sampling needle in at least one of the plurality of ultrasound images;
• based on detecting the location of the distal end of the tissue sampling needle, making a determination that the distal end of the tissue sampling needle enters the sampling target region from an entry point on a contour of the sampling target region and then exits the sampling target region from an exit point on the contour different from the entry point;
• and
• after the determination, notifying an examiner that the tissue sampling needle has passed through the sampling target region.