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Fluorescent computer tomography: a model for correction of X-ray absorption

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3 Author(s)
Hogan, J.P. ; Electro-Opt. Technol. Center, Tufts Univ., Medford, MA, USA ; Gonsalves, R.A. ; Krieger, A.S.

The distributions of individual trace elements within a sample can be found using fluorescent computed tomography (FCT). The absorption of incident and fluorescent X-rays results in degraded reconstructions of the distributions. The proposed method uses the absorption density, measured using conventional absorption tomography, to remove absorption effects. A model for FCT with absorption is developed and simulated. The resulting corrected reconstructions are compared to the reconstructions degraded by attenuation efforts. A comparison is made with other methods which utilize knowledge of the sample composition and a standard source to estimate the absorption coefficients used to correct for attenuation effects

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Nuclear Science, IEEE Transactions on  (Volume:38 ,  Issue: 6 )