PROBLEM TO BE SOLVED: To improve rigidity and to suppress increase in X-ray absorption.SOLUTION: A cradle 10 has such a structure that a core material 11 made of resin foam is covered with an exterior 20 including two or more CFPR layers. At the upper surface part of the exterior 20, a CFRP layer is laminated without inserting a resin film. At the bottom surface part of the exterior 20, a resin film is inserted and laminated between the CFPR layers. Consequently, regarding the bottom surface which supports the weights of the patient and the cradle 10, the resin film which is more inexpensive than the CFRP layer is inserted between the CFRP layers, so that the number of the CFRP layers required for obtaining desired rigidity (thickness) is reduced to reduce costs. Moreover, since no resin film is inserted between the CFRP layers of the upper surface, the increase in X-ray absorption is reduced compared with a structure of inserting a resin film between the CFRP layers of the upper surface.COPYRIGHT: (C)2008,JPO&INPIT【課題】剛性を高めると共にX線吸収の増加を抑制する。【解決手段】クレードル(10)は、樹脂発泡体製の芯材(11)に、2層以上のCFRP層を含む外装(20)で覆った構造である。外装(20)の上面部分は、CFRP層が樹脂フィルムを挟まずに積層されている。外装(20)の底面部分は、CFRP層の間に樹脂フィルムを挟んで積層されている。【効果】被検体およびクレードル(10)の荷重を支える底面については、CFRP層に比べて安価な樹脂フィルムをCFRP層の間に挟むため、所望の剛性(厚さ)を得るために必要なCFRP層の数が少なくて済み、コストを低減できる。さらに、上面はCFRP層の間に樹脂フィルムを挟まないため、上面のCFRP層の間にも樹脂フィルムを挟む構造に比べてX線吸収の増加を抑制することが出来る。【選択図】図3
