| 摘要 |
A digital panoramic X-ray imaging apparatus comprising an X-ray generator for irradiating a subject P with X-rays, an X-ray imaging device for detecting an image of X-rays having passed through the subject P and a swivel member for supporting the X-ray generator and the X-ray imaging device and for rotating the X-ray generator and the X-ray imaging device around subject P is disclosed. The X-ray imaging device comprises a rotation drum disposed in parallel with the rotation shaft of the swivel member, a storage fluorescent sheet disposed on the circumferential surface of the rotation drum, a laser for irradiating the storage fluorescent sheet with excitation light and a photomultiplier for receiving accelerated-phosphorescence emission caused from the storage fluorescent sheet by excitation light irradiation. Primary scanning is performed by rotating the rotation drum, and secondary scanning is performed by moving the laser and the photomultiplier in the axial direction of the rotation drum. With this structure, a compact, lightweight digital panoramic X-ray imaging apparatus is obtained.
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