A variable resolution x-ray detector for computed tomography: II. Imaging theory and performance

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 an...

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Bibliographic Details
Published inMedical physics (Lancaster) Vol. 27; no. 8; p. 1875
Main Authors DiBianca, F A, Zou, P, Jordan, L M, Laughter, J S, Zeman, H D, Sebes, J
Format Journal Article
LanguageEnglish
Published United States 01.08.2000
Subjects
Algorithms
Animals
Arm - diagnostic imaging
Cricetinae
Equipment Design
Fingers - diagnostic imaging
Head - diagnostic imaging
Humans
Models, Statistical
Radiography, Thoracic
Tomography, X-Ray Computed - instrumentation
Tomography, X-Ray Computed - methods
X-Ray Diffraction
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Summary: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 is > or = 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.
ISSN:0094-2405
DOI:10.1118/1.1285831