Abstract:
OBJECTIVES:X-ray computed tomography (CT) using phase contrast can provide images with greatly enhanced soft-tissue contrast in comparison to conventional attenuation-based CT. We report on the first scan of a human specimen recorded with a phase-contrast CT system based on an x-ray grating interferometer and a conventional x-ray tube source. Feasibility and potential applications of preclinical and clinical phase-contrast CT are discussed. MATERIALS AND METHODS:A hand of an infant was scanned ex vivo at 40 kVp tube voltage. The simultaneously recorded attenuation and phase-contrast CT images were quantitatively compared with each other, by introducing a specific Hounsfield unit for phase-contrast imaging. RESULTS:We observe significantly enhanced soft-tissue contrast in the phase images, when compared with the attenuation data. Particularly, tendons and ligaments appear with strongly increased contrast-to-noise ratio. CONCLUSIONS:Our results demonstrate the huge potential of phase-contrast CT for clinical investigations of human specimens and, potentially, of humans. Because the applied technique works efficiently with conventional x-ray tubes and detectors, it is suitable for the realization of preclinical and clinical phase-contrast CT systems.
journal_name
Invest Radioljournal_title
Investigative radiologyauthors
Donath T,Pfeiffer F,Bunk O,Grünzweig C,Hempel E,Popescu S,Vock P,David Cdoi
10.1097/RLI.0b013e3181e21866subject
Has Abstractpub_date
2010-07-01 00:00:00pages
445-52issue
7eissn
0020-9996issn
1536-0210journal_volume
45pub_type
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journal_title:Investigative radiology
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