Source:http://linkedlifedata.com/resource/pubmed/id/11898900
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
3
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| pubmed:dateCreated |
2002-3-18
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| pubmed:abstractText |
A subject-standing-type cone-beam computed tomography (CT) with high spatial resolution has been developed as a new three-dimensional imaging modality for subjects standing or sitting naturally on a turntable. A 16-in. X-ray image intensifier and charge coupled device camera acquires a 12-bit 5122-pixel projection at 60 f/s and the rotation period is 4.8 or 9.6 s for 288 or 576 projections, respectively. To reduce image noise, the system controls the X-ray pulse duration and iris-opening area through real-time analysis of the projection image. To improve CT accuracy and eliminate artifacts, the veiling glare of the image intensifier and scattered X-rays are corrected. Human chest and orthopedic studies with about 50 patients were conducted. Three-dimensional images with a spherical field of view with a diameter of 21-25 cm, 0.4- to 0.5-mm voxels and a 512(3) matrix were obtained. In coronal, sagittal and volume rendering images, the surface of arthrosis was visualized smoothly with a resolution higher than that of conventional CT. In the case of gonarthrosis, narrowing of the clearance at the surface of arthrosis was visualized clearly under body-weight burdening, which would be difficult if the subject was lying down.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:citationSubset |
IM
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| pubmed:status |
MEDLINE
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| pubmed:issn |
0921-3775
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:volume |
11
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
177-89
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| pubmed:dateRevised |
2004-11-17
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| pubmed:meshHeading |
pubmed-meshheading:11898900-Algorithms,
pubmed-meshheading:11898900-Biomedical Engineering,
pubmed-meshheading:11898900-Equipment Design,
pubmed-meshheading:11898900-Humans,
pubmed-meshheading:11898900-Knee Joint,
pubmed-meshheading:11898900-Lung Neoplasms,
pubmed-meshheading:11898900-Orthopedic Procedures,
pubmed-meshheading:11898900-Phantoms, Imaging,
pubmed-meshheading:11898900-Pneumothorax,
pubmed-meshheading:11898900-Posture,
pubmed-meshheading:11898900-Radiography, Thoracic,
pubmed-meshheading:11898900-Scattering, Radiation,
pubmed-meshheading:11898900-Tomography, X-Ray Computed
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| pubmed:year |
2001
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| pubmed:articleTitle |
Development of a subject-standing-type cone-beam computed tomography for chest and orthopedic imaging.
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| pubmed:affiliation |
Central Research Laboratory, Hitachi, Ltd, Kokubunji-shi, Tokyo, Japan. r-baba@crl.hitachi.co.jp
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| pubmed:publicationType |
Journal Article
|