1. A diagnostic imaging support equipment comprising: a data storage unit configured to store object data and series image data of plural images obtained at different timings obtained by medical image acquisition equipment, and the object data including (1) specific information for specifying image acquisition conditions at the imaging timings, (2) information of a key image for generating a thumbnail of the present image data, (3) information of a key image for generating a thumbnail of the past image data, and (4) synchronization information to synchronize an imaging position in the present image data and the past image data; an information management unit configured to generate a combination of plural thumbnail images based on image data of a portion of each series image data as combination information of said present image data and said past image data by referring to said object data, for displaying with a synchronization of the imaging positions between the present image data and the past image data; and a display unit configured to display the thumbnails of the present image data and the past image data, the display unit referring to the synchronization information of the object data.