| Development of a compact computed tomographic apparatus for dental use. | |
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MedLine Citation:
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PMID: 10455389 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To describe a compact computed tomographic apparatus (Ortho-CT) for use in dental practice. METHODS: Ortho-CT is a cone-beam-type of CT apparatus consisting of a multifunctional maxillofacial imaging machine (Scanora, Soredex, Helsinki, Finland) in which the film is replaced with an X-ray imaging intensifier (Hamamatsu Photonics, Hamamatsu, Japan). The region of image reconstruction is a cylinder 32 mm in height and 38 mm in diameter and the voxel is a 0.136-mm cube. Scanning is at 85 kV and 10 mA with a 1 mm Cu filter. The scan time is 17 s comparable with that required for rotational panoramic radiography. A single scan collects 512 sets of projection data through 360 degrees and the image is reconstructed by a personal computer. The time required for image reconstruction is about 10 min. RESULTS: The resolution limit was about 2.0 lp mm-1 and the skin entrance dose 0.62 mGy. Excellent image quality was obtained with a tissue-equivalent skull phantom: roots, periodontal ligament space, lamina dura, and cancellous bone were clearly visualized. CONCLUSION: Ortho-CT provides three-dimensional images of excellent quality for dental use at a low entrance dose. |
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Authors:
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Y Arai; E Tammisalo; K Iwai; K Hashimoto; K Shinoda |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Dento maxillo facial radiology Volume: 28 ISSN: 0250-832X ISO Abbreviation: Dentomaxillofac Radiol Publication Date: 1999 Jul |
Date Detail:
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Created Date: 2000-07-06 Completed Date: 2000-07-06 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7609576 Medline TA: Dentomaxillofac Radiol Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 245-8 Citation Subset: D |
Affiliation:
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Department of Radiology, Nihon University School of Dentistry, Tokyo, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Humans Radiation Dosage Radiography, Dental, Digital / instrumentation* Reproducibility of Results Tomography, X-Ray Computed / instrumentation* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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