In general, in the medical field, an X-ray radiograph, such as computed tomography (CT), is used for a diagnosis.
However, since the X-ray radiograph illustrates an inside of a human body, an ordinary person is not accustomed to the X-ray radiograph except for a trained professional such as a doctor.
Especially, in the dental or plastic surgery field, use of only the X-ray radiograph cannot satisfy demand for easily identifying a facial change after treatment.
In this aspect, a way to efficiently obtain a 3D facial image for 3-dimensionally illustrating a part of a human body, such as a face, is required.
In this regard, it may be considered to use a three dimensional (3D) imaging device commonly used for 3D movies. However, it is problematic in that the 3D imaging device is very expensive, and takes much time for 3D scanning.
Accordingly, a way to obtain a more effective 3D facial image for medical use is urgently required.