Abstract: A technology is provided for enabling accurate understanding of a movement of a region that affects imaging, particularly, processing corresponding to a sudden or non-steady movement. A body movement information processing device receives a signal from a measuring device that measures movement information of a subject disposed in an imaging device, and processes the movement information of the subject. Therefore, the body movement of the subject is calculated using the signal from the measuring device. In that case, a calculation technique of discriminating between a periodic movement and a non-steady movement of the subject is used. The non-steady movement of the subject is extracted from the calculated body movement by using a mask for selecting a spatial region of a movement of the subject.

Abstract: Provided is a method for machining a tooth plane that is formed on a circumferential surface of a cylindrical toothed member and that extends along a center axis of the toothed member. The method includes: cutting the tooth plane by a peripheral cutting edge of an end mill while keeping a rotation axis of the end mill at a predetermined steady orientation and moving the end mill parallel to the center axis of the toothed member; rotating the toothed member by a predetermined angle around the center axis of the toothed member; and cutting the tooth plane by the peripheral cutting edge of the end mill while keeping the rotation axis of the end mill at the steady orientation and moving the end mill parallel to the center axis of the toothed member.

Abstract: Provided is a method for machining a tooth plane that is formed on a circumferential surface of a cylindrical toothed member and that extends along a center axis of the toothed member. The method includes: cutting the tooth plane by a peripheral cutting edge of an end mill while keeping a rotation axis of the end mill at a predetermined steady orientation and moving the end mill parallel to the center axis of the toothed member; rotating the toothed member by a predetermined angle around the center axis of the toothed member; and cutting the tooth plane by the peripheral cutting edge of the end mill while keeping the rotation axis of the end mill at the steady orientation and moving the end mill parallel to the center axis of the toothed member.