Abstract: The present invention provides a plate-type heater designed to allow uniform generation of heat across the entire surface of the heater, comprising an upper component composed of a first outer covering and a first intermediate layer joined together and a lower component composed of a second outer covering and a second intermediate layer joined together, with a heating element being placed between said upper component and lower component and wires laminated onto the two end surfaces of said heating element.

Abstract: Provided is a holder device for analyzing characteristics of a dosimeter. In the holder device, the dosimeter is located in a desired direction on a radiation path along which radiation is irradiated from a radiation emitter, and a radiation absorbance characteristic is recognized according to a radiation dose absorbed by the dosimeter. The holder device includes: a dosimeter holder fixedly supporting the dosimeter; a body having a partial spherical portion with a specific curvature, and having a plurality of mounting holes containing the dosimeter holder; and a supporter supporting the body so that the dosimeter is located on the radiation path. Accordingly, in the holder device for analyzing characteristics of a dosimeter, one or more dosimeters can be disposed at a desired angle and position with respect to a radiation emitter, characteristics of the dosimeter can be accurately analyzed, and thus radiation treatment and treatment schedule can be effectively performed.

Abstract: The present invention provides a plate-type heater designed to allow uniform generation of heat across the entire surface of the heater, comprising an upper component composed of a first outer covering and a first intermediate layer joined together and a lower component composed of a second outer covering and a second intermediate layer joined together, with a heating element being placed between said upper component and lower component and wires laminated onto the two end surfaces of said heating element.