Abstract: A material decomposition apparatus for performing decomposition of a material in an object. The apparatus includes a data storage section for storing correction data preliminarily generated by decomposing one of three or more materials into the other two materials, a data input section to which radiation data of the object is inputted, the radiation data being divided into a plurality of energy levels, and a decomposition processing section for repeatedly performing two-material decomposition for decomposition of the other two materials of the three or more materials using the radiation data at different energy levels and the correction data to perform decomposition of the inside of the object into the three or more materials.

Abstract: A "hard-top" type automobile body having rear side panel structures formed at front edge portions with seats for rear edges of side doors. A rear pillar extends from each side panel structure to the roof. A longitudinal reinforcement member is provided in the side panel structure to extend from the door edge seat rearwardly to be connected with the rear pillar. The member further extends beyond the rear pillar and has a rear end connected with a transversely extending reinforcement so that the transverse rigidity of the rear side panel is increased at the area of the door edge seat without increasing the cross-section of the longitudinal reinforcement member.