Ultrasonograph, ultrasonic image processing device, and ultrasonic image processing program

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In time phases except a first time phase, a contour tracking part tracks the position of a region of interest based on image data acquired in each of the time phases. A re-tracking part receives correction of the position of the region of interest in a second time phase, and obtains the position of the corrected region of interest in and after the second time phase based on the image data acquired in and after the second time phase. From position information of the region of interest in and before the second time phase and position information of the corrected region of interest in and after the second time phase, a position calculator obtains position information of the region of interest in all the time phases. A computing part obtains motion information of a tissue within the region of interest based on the position information of the region of interest.