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Scattering distorts images obtained from X-ray transmission, especially those measured using computed tomography (CT). We previously proposed a scatter-correction method involving a simple measurement on a cylindrical phantom with the same dimensions as a subject under study and a deterministic calculation. This method works well, but in practice, it requires a separate phantom size-matched to every subject. In this paper, we demonstrate an interpolated scatter correction method that uses phantoms smaller and larger than the subject. We also applied this correction method to a subject with similar shape to a human body. The corrected results were verified using energy-resolved CT, and the obtained effective atomic numbers and electron densities were compared with those in the NIST database.

A scattered X-ray correction method for transmission measurements and its verification using energy-resolved computed tomography