US Patent 11980489 Radiation imaging apparatus

A mechanism that enhances rigidity of a casing of a radiation imaging apparatus while effectively using limited space inside the casing is provided. The rectangular casing that contains a radiation detecting panel, the radiation detecting panel detecting incident radiation, includes a front cover including an incident surface on which the radiation is incident, and a rear cover disposed in a manner to be opposite to the front cover. The rear cover includes one or more recess portions and a rib, at least one end of the rib being connected to a recess portion of the one or more recess portions, at a bottom surface opposite to the incident surface.