The Amplitude correction method.
Frequency amplitude correction with X-ray scattering data enhances
the Fourier amplitudes of a reconstructed cryo-EM volume so they
more closely resemble those of experimental low-angle X-ray
scattering data. Normal amplitude correction (in which case the
SNR weighted averaging of particles will still occur properly) may
be applied or without it, in which case the (phase-flipped) data
is not corrected during averaging, then the final 3D model is 'fixed'.