Decomposition of multi-energy scan projections using multi-step fitting
US7197172B1 · kind B1 · utility
56Cited by
17References
47Claims
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Key dates
| Filing date | Jul 1, 2003 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Sep 13, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/227
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of decomposition of projection data is provided, wherein such projection data includes input projection data acquired using at least two x-ray spectra for a scanned object, including low energy projection data (PL) and high energy projection data (PH); the method comprises solving the projections PL and PH to determine a photoelectric line integral (Ap) component of attenuation and a Compton line integral (Ac) component of attenuation of the scanned object using a multi-step fitting procedure and constructing a Compton image Ic and a photoelectric image Ip from the Compton line integral and photoelectric line integral.
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