1. A medical information storing apparatus that is connected to a report preparation support system for preparing an interpretation report and stores medical images acquired by a scan executed by a medical diagnostic imaging apparatus, the medical information storing apparatus comprising: a storage unit configured to store an object including an imaging condition used for a scan executed by the medical diagnostic imaging apparatus, a positioning image used in the scan in a form of the object linking to a medical image acquired by the scan, and information to identify an imaging range of a past imaging; and a report information insertion unit implemented by processing circuitry and configured to receive a notice of preparation completion of an interpretation report based on the medical images from a report preparation support system, the medical images being acquired by using the object, at a timing of receiving the notice of preparation completion of the interpretation report, to search out the object used in the acquisition of the medical images of the interpretation subject from the storage unit, to search a past interpretation report, to insert information to specify the interpretation report and the past interpretation report into the searched object in a case where the past interpretation report is found, to insert information to specify the interpretation report into the searched object in a case where the past interpretation report is not found, and to automatically update the storage unit to store an updated object with the imaging condition, the positioning image, and the information to specify the interpretation report.