Contrast-to-noise in X-ray differential phase contrast imaging
| Autor: | Gereon Vogtmeier, Sebastian Schusser, Ewald Rössl, Klaus Engel, Dieter Geller, Gerhard Martens, Thomas Köhler |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
Nuclear and High Energy Physics Digital mammography business.industry media_common.quotation_subject X-ray Noise (electronics) Absorption contrast Wavelength Nuclear magnetic resonance Optics Contrast-to-noise ratio Contrast (vision) Differential phase contrast business Instrumentation media_common |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 648:S202-S207 |
| ISSN: | 0168-9002 |
| Popis: | A quantitative theory for the contrast-to-noise ratio (CNR) in differential phase contrast imaging (DPCI) is proposed and compared to that of images derived from classical absorption contrast imaging (ACI). Most prominently, the CNR for DPCI contains the reciprocal of thespatial wavelength to be imaged, the fringe visibility, and a tunable factor dependent on the system geometry. DPCI is thus potentiallybeneficial especially for the imaging of small object structures. We demonstrate CNR calculations for mammography, finding optimal imaging energies between 15 and 22 keV for ACI, and between 20 and 40 keV for DPCI. |
| Databáze: | OpenAIRE |
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