A modified x-ray spectra reconstruction technique.
We have previously reported on a four-parameter Laplace transform pair model that accurately reconstructs x-ray spectra from attenuation data. However, for some spectra, the model exhibits non-physical characteristics at the higher x-ray energies. This results when one of the fitted parameters, v, is less than or equal to 0.6. Simply limiting the parameter to values greater than 0.6 produces an unsatisfactory result. It is shown that improved accuracy is obtained when the model is applied to a more filtered segment of the attenuation curve. The resulting spectrum is satisfactory for the more filtered beam. One can then reliably construct the original spectrum by mathematically correcting for the additional filtration.
Archer
B R
BR
Department of Radiology, Baylor College of Medicine, Houston, Texas 77030.
Wagner
L K
LK
D008962:Models, Theoretical; D013057:Spectrum Analysis / Q000379:methods*; D014965:X-Rays