1989 Fiscal Year Final Research Report Summary
Development of the New Digital Panoramic Tomography
| Project/Area Number |
63870082
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
外科・放射線系歯学
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| Research Institution | Nihon University school of Dentistry |
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Principal Investigator |
SAIRENJI Eiko Nihon Unv.DENT., Professor, 歯学部, 教授 (40058839)
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| Co-Investigator(Kenkyū-buntansha) |
ARAI Yoshinori Nihon Unv.DENT., Assistant, 歯学部, 助手 (20212607)
OHKI Tohru Nihon Unv.DENT., Assistant, 歯学部・放射線, 助手 (20152069)
HASIMOTO Koji Nihon Unv.DENT., Lecturer, 歯学部, 講師 (90139197)
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| Project Period (FY) |
1988 – 1989
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| Keywords | Panoramic tomography / Digital subtraction / Tilted tooth / Ghost image / Computer system / Radiology |
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| Research Abstract |
In the panoramic tomography,the X-ray beam passing through a object contains vast informations of the numerous tomographic layers. However, we usually don't use the informations of all the other tomographic layers except that of focus layer. We made an attempt to develop the new digital panoramic tomograph system. The system is composed of (1)screen,(2)SIT-TV camera,(3)optical-Disk,(4)frame-memory(512x,1024x32bitx2) and (5)32bit computer system. It can be possible to reconstruct any desired tomographic image with only one scanning.
It is also possible to erase the ghost image which is clinical issues on diagnosis. The distal panoramic tomography can be obtained without ghost image as a result of its subtraction from original image using the computer simulation.
And the conventional panoramic tomography is not suitable the image of tilted tooth because of its difficulty to get the focus on the tomographic layer. To resolve this problem,the tomographic layer is set up along with each tooth axis so that even tilted tooth is brought into focus. As a result the image of any desired layer has much better resolution than that of conventional panoramic tomography.
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