Dual Energy Decomposition

xrayphysics.xrayPhysics.setDEDlookupTable(self, spectralResponse_L, spectralResponse_H, gammas, basisFunction_1, basisFunction_2, referenceEnergies=None, T_atten=0.0, N_atten=0)

Calculate a dual energy decomposition transfer function

Parameters:

  • spectralResponse_L (numpy array) – low energy spectra model

  • spectralResponse_H (numpy array) – high energy spectra model

  • gammas (numpy array) – energies at which both the spectra models are defined

  • basisFunction_1 (numpy array) – first basis function

  • basisFunction_2 (numpy array) – second basis function

  • referenceEnergies (2-element numpy array) – the low and high energy (keV) energies of the synthesized monochromatic attenuation

  • T_atten (scalar) – the sampling rate of the polychromatic attenuation (if unspecified, uses default values)

  • N_atten (int) – the number of samples of the polychromatic attenuation (if unspecified, uses default values)

Returns:

A 2D numpy array that maps the low and high polychromatic attenuation to the low and high (at referenceEnergies) monochromatic attenuation

xrayphysics.xrayPhysics.PhotoelectricBasis(self, gammas)

Returns the photoelectric basis function

xrayphysics.xrayPhysics.ComptonBasis(self, gammas)

Returns the Compton basis function

xrayphysics.xrayPhysics.PCAbases(self, listOfMaterials, gammas)

Returns the two basis functions derived from the PCA of several material cross sections