Abstract: A radiation tomography apparatus is provided. The radiation tomography apparatus is configured to display a dose near a surface of a subject.

Abstract: A backing member is provided in an ultrasonic probe on a side of the ultrasonic probe opposite from a transmission direction of an ultrasonic wave to a subject with respect to an ultrasonic vibrator that transmits the ultrasonic wave to the subject. The backing member includes a plate-like backing material, a thermal conductor, and a thermal conductive plate, wherein the thermal conductor and the thermal conductive plate are made of a material having a thermal conductivity higher than a thermal conductivity of the backing material, wherein the thermal conductor is buried in the backing material, and formed to have a columnar shape so as to reach both of two plate surfaces of the backing material, and wherein the thermal conductive plate is provided on at least the plate surface of the backing material that is near the ultrasonic vibrator.

Abstract: A keyboard input device and a manufacturing method thereof is provided. The keyboard input device comprises a keyboard assembly having at least one key, a sensing device configured to sense the position of a key that produces a trigger action and to create a corresponding output signal, and a controller configured to receive the output signal from the sensing device and determine the key producing the trigger action.

Abstract: A linearity power amplification device is provided. The device comprises a divider, a combiner, n?1 first signal paths, and a second signal path coupled between the divider and the combiner. The first signal path comprises a main invariable attenuator connected to the divider, a first power amplifier connected to the combiner, and a first attenuator and a first shifter coupled between the first power amplifier and the main invariable attenuator. The second signal path comprises a main amplification circuit, and an error calibration circuit.

Abstract: A probe cover is provided. The probe cover is configured to be detachably attached to an ultrasonic probe and cover plural switches on a surface of the ultrasonic probe, the probe cover including a depression portion by which an operator can depress at least some of the plural switches when the probe cover is attached to the ultrasonic probe.