A technique for improvement of linear attenuation coefficient maps obtained by means of X-ray tomography in multiple energies

This study presents a technique for quantitative enhancement of both linear attenuation coefficients and visual features of maps obtained from multiple energies using tomographic systems. The quality of images obtained by computerized X-ray tomography in multiple energies is limited due to the number of noise pixels in the images. The method developed uses enhancement techniques with adaptative filtering that aims for results comparable to those obtained by single energy computerized tomography. The improvement achieved in the processed images confirms that this method is suitable for analyses of multiple energies with loss of pixel to pixel information, where information on density and material humidity assayed tomographically can be obtained accurately in the acceptable error range of single energy tomography.