A variable resolution x-ray detector for computed tomography: II. Imaging theory and performance
| Autor: | Frank A. DiBianca, Joseph S. Laughter, Herbert D. Zeman, Ping Zou, J. Sebes, Lawrence M. Jordan |
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| Rok vydání: | 2000 |
| Předmět: |
Physics
Scanner Models Statistical business.industry Detector Resolution (electron density) X-ray detector Equipment Design General Medicine Fingers Optics X-Ray Diffraction Cricetinae Arm Medical imaging Animals Humans Radiography Thoracic Image sensor Computed radiography Tomography X-Ray Computed business Head Image resolution Algorithms |
| Zdroj: | Medical Physics. 27:1875-1880 |
| ISSN: | 0094-2405 |
| DOI: | 10.1118/1.1285831 |
| Popis: | A computed tomography (CT) imaging technique called variable resolution x-ray (VRX) detection provides variable image resolution ranging from that of clinical body scanning (1 cy/mm) to that of microscopy (100 cy/mm). In this paper, an experimental VRX CT scanner based on a rotating subject table and an angulated storage phosphor screen detector is described and tested. The measured projection resolution of the scanner isor = 20 lp/mm. Using this scanner, 4.8-s CT scans are made of specimens of human extremities and of in vivo hamsters. In addition, the system's projected spatial resolution is calculated to exceed 100 cy/mm for a future on-line CT scanner incorporating smaller focal spots (0.1 mm) than those currently used and a 1008-channel VRX detector with 0.6-mm cell spacing. |
| Databáze: | OpenAIRE |
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