An apparatus for machining tubing includes a weighted base, an upright frame attached to the weighted base, and a laser light source attached to the weighted base. The connectors are disposed inside the slits of module cooling members, and the transmission modules can be connected to and disconnected from the connectors disposed through the slits. In specific, the amount of light emission in the still image portion is made as small as possible in a corresponding divided region of the backlight, and the amount of light emission in the moving image portion is controlled so as not to be changed as much as possible in a corresponding divided region of the backlight. The transthoracic impedance measures are grouped into at least one measures set corresponding to one of an inspiratory phase and an expiratory phase.