▎ 摘　　要

NOVELTY - The assembly has a first base body (111) whose end is arranged with a target surface (112). The target surface is provided with a heat dissipation area and a rail area (1121). The heat dissipation area is located in a circumferential direction of the rail area. The heat dissipation area is paved with a first graphene layer. The heat dissipation area is provided with a first zone and a second zone. An external assistant component is arranged opposite to the first zone. The first graphene layer is laid in the second area. A second base body (114) mounted on a mounting surface (113). A side surface of the second base body is paved with a second graphene layer that is arranged far away from an end surface of the first base body. USE - Anode assembly for a X-ray tube of a medical imaging device (all claimed). ADVANTAGE - The first graphene layer can lay in the heat dissipation area so to to improve heat dissipation capacity and reduce firing rate of secondary electrons, thus improving utilization lifetime of the assembly, obtaining a clear image and avoiding secondary artifacts of the image. DESCRIPTION OF DRAWING(S) - The drawing shows a front view of an anode assembly. Rotor (12) Base bodies (111,114) Target surface (112) Mounting surface (113) Two units (121,122) Rail area (1121)