The image storage server 3 is a computer that stores and manages various types of data and comprises a high-capacity external storage device and database management software. The image storage server 3 performs communication with other apparatuses through the wired or wireless network 4 to transmit and receive, for example, image data. Specifically, the image storage server 3 acquires various types of data including image data of the CT image generated by the three-dimensional imaging apparatus 2 through the network, stores the acquired data in a recording medium, such as a high-capacity external storage device, and manages the data. In addition, the storage format of the image data and the communication between the apparatuses through the network 4 are based on a protocol such as Digital Imaging and Communication in Medicine (DICOM).

The disease region discrimination apparatus 1 is configured by installing a learning program and a disease region discrimination program according to the present disclosure in one computer. The computer may be a workstation or a personal computer that is directly operated by a doctor who performs diagnosis or may be a server computer that is connected with them through the network. The learning program and the disease region discrimination program are recorded on a recording medium, such as a digital versatile disc (DVD) or a compact disc read only memory (CD-ROM), and are then distributed. The learning program and the disease region discrimination program are installed in the computer from the recording medium. Alternatively, the learning program and the disease region discrimination program are stored in a storage device of a server computer connected to the network or a network storage so as to be accessed from the outside, are downloaded to the computer used by the doctor on request, and are then installed in the computer.