A measurement method to perform a measurement operation on an ultrasound image on a touch screen of an ultrasound imaging device, comprising: - providing, on the ultrasound image, at least a first moveable object (810-860; 1301; 1711) and a second moveable object (810-860; 1721), which are associated with the measurement operation; - activating the first and second moveable objects for movement according to at least a touch-and-drag input from a user; - receiving at least the touch-and-drag input with respect to one of the activated first and second movable objects; and - displacing the one of the activated first and second movable objects, that is touched-and-dragged, relative to the other one of the first movable object and the second movable object, that is not touched-dragged, in the ultrasound image in correspondence with the received touch-and-drag input; characterised by - providing, on the ultrasound image, a first area which extends around the first movable object to define a first extended touch recognition range with respect to the first moveable object and a second area, which extends around the second movable object to define a second extended touch recognition range with respect to the second moveable object; and - receiving the touch-and-drag input from the user, by recognizing that, even if the user does not touch the one of the activated first and second moveable object, that is to be touched-and-dragged, the one of the activated first and second moveable objects is touched when the user touches the respective first area or the second area around the one of the activated first and second moveable objects, that is touched-and-dragged, wherein each boundary of the first and second extended touch recognition ranges encloses a corresponding one of the first and second moveable objects in the middle of respectively the first and second areas - providing, on the ultrasound image, at least a first moveable object (810-860; 1301; 1711) and a second moveable object (810-860; 1721), which are associated with the measurement operation; - activating the first and second moveable objects for movement according to at least a touch-and-drag input from a user; - receiving at least the touch-and-drag input with respect to one of the activated first and second movable objects; and - displacing the one of the activated first and second movable objects, that is touched-and-dragged, relative to the other one of the first movable object and the second movable object, that is not touched-dragged, in the ultrasound image in correspondence with the received touch-and-drag input; characterised by - providing, on the ultrasound image, a first area which extends around the first movable object to define a first extended touch recognition range with respect to the first moveable object and a second area, which extends around the second movable object to define a second extended touch recognition range with respect to the second moveable object; and - receiving the touch-and-drag input from the user, by recognizing that, even if the user does not touch the one of the activated first and second moveable object, that is to be touched-and-dragged, the one of the activated first and second moveable objects is touched when the user touches the respective first area or the second area around the one of the activated first and second moveable objects, that is touched-and-dragged,