Figure 3From: Is there evidence for change to collagen within parchment samples after exposure to an X-ray dose during high contrast X-ray microtomography? a multi technique investigationA scatter plot of the eigenvalues of basis function 1 versus basis function 2 for the modern and historical samples. The variation in the eigenvalues of the base functions is greater between the samples than the effect of X-ray exposure of a specific sample.Back to article page