Abstract: An easy-assembly bed includes a top plate, and a leg portion having a plurality of leg members that are linked using notched joints. The top plate is constituted of a bonded material, which includes a plate-shaped foam plate formed with a foam body, and a front board member and a rear board member having an identical shape to the foam plate and that are bonded to the rear surface and the front surface of the foam plate, respectively, and a top plate molded resin portion overing the cut ends of the bonded material with a molded resin; and the leg members are each constituted of a grooved bonded material, which includes a plate-shaped grooved foam plate having locking grooves and formed with a foam body, and a grooved front board member and a grooved rear board member on the front surface and the rear surface of the grooved foam plate.

Abstract: This bolus, which is for radiation therapy, can be deformed to match the shape of a human body surface, and has little deformation during therapy. The bolus forming material is a rubber composition containing ethylene-propylene rubber and a temperature-sensitive material. The bolus forming material has a JIS type A hardness of 20 or higher at 30° C., and thus is not susceptible to deformation. The bolus forming material has a JIS type E hardness of 10 to 60 at 70° C., and thus easily deforms. The bolus forming material shifts the peak of the percentage depth dose for electron beams and X-rays in the beam source direction at 0.8 to 1.2 times the thickness thereof. Therefore, the bolus forming material has dose characteristics in the depth direction that are substantially the same as a human body. After a sheet of the bolus forming material is heated to around 70° C., the sheet deforms.