An apparatus for medical diagnostic imaging may include a database that relates help information with multiple types of attribute values and stores this information; an operations state acquisition part that acquires the attribute values that expresses the current operational status of the medical diagnostic imaging apparatus; a search part that searches the knowledge database, based on the attribute values; and a display that displays help information or a list of help information, based on the search results of the search part. As the present invention searches for and displays help information according to the operational status of the apparatus for medical diagnostic imaging, it is possible to provide the operator with help information suitable for a diagnosis currently being made.