Consideration of the filtered data alone provides clear distributions in the reconstructed images (Form I, pink; Form II, green; Figure ). As the compaction pressure is increased, we begin to see a change to the intensity and distribution of Form I (pink, Figure ). The observed intensities of Form I diminish in the center of tablets compressed to higher pressures but are present at the edges of the tablet. This change clearly begins between 153 and 211 MPa. At the same time, the contribution from Form II is not significant until 283 MPa (green). The pressure at which the changes occur is commensurate with the previous diffraction studies but there is a difference between the pressures at which these events occur indicating that they cannot be correlated. To help explain this we need to consider the nonfiltered data as this reveals some significant findings to enhance our understating of the changes.