Abstract: A detector module unit according to an embodiment includes a detecting element array, signal processing circuitry, a holding plate, and a casing. In the detecting element array, a plurality of detecting elements each configured to convert radiation into an electrical signal are arranged. The signal processing circuitry is configured to process the electrical signals. The holding plate is configured to hold the detecting element array and the signal processing circuitry. The casing is thermally connected to the signal processing circuitry and has a first face and a second face opposing each other while the holding plate is interposed therebetween. The first face and the second face of the casing each have a fin.

Abstract: A battery pack having thermal diffusivity and anti-vibration property is provided. The battery pack includes a plurality of batteries and a battery holder having a plurality of battery housing portions configured to store the batteries, wherein the battery holder includes an elastic material having thermal conductivity. The elastic material includes rubber or a thermoplastic elastomer. The battery holder includes an electrically insulating material.

Abstract: A radiation detector according to an embodiment includes a plurality of radiation detector modules and a fixing frame. When a radiation detector module is attached to the fixing frame, a guiding part with a groove shape formed at an end of a support member of the radiation detector module on a side of the fixing frame is fitted to a guiding pin provided to an end of the fixing frame, so that the radiation detector module is positioned in a radiation irradiation direction while a movement thereof in a channel direction and a row direction is restricted.

Abstract: A radiation detector according to an embodiment includes a plurality of radiation detector modules and a fixing frame. When a radiation detector module is attached to the fixing frame, a guiding part with a groove shape formed at an end of a support member of the radiation detector module on a side of the fixing frame is fitted to a guiding pin provided to an end of the fixing frame, so that the radiation detector module is positioned in a radiation irradiation direction while a movement thereof in a channel direction and a row direction is restricted.

Abstract: A battery pack having thermal diffusivity and anti-vibration property is provided. The battery pack includes a plurality of batteries and a battery holder having a plurality of battery housing portions configured to store the batteries, wherein the battery holder includes an elastic material having thermal conductivity. The elastic material includes rubber or a thermoplastic elastomer. The battery holder includes an electrically insulating material.