The correction procedure and results for the vertical shift with the TXM nano-CT experimental data.

<p>(a) is one of the two dimensional projection images after logarithm operation. (b) depicts the plane integral curve at the first view angle marked by the solid blue line and the one at other view angle marked by the dashed red line. (c) shows the cross correlation result of these two curves in (b). (d) is the correction curve. (e) and (h) are the sinogram and the CT image of the 690th row of the projection before correction. (f) and (i) are after correction. (g) shows the difference between (e) and (f). (j) shows the difference between (h) and (i). (k) and (n) are the sinogram and the CT image of gold particles before correction. (l) and (o) are after correction. (m) shows the difference between (k) and (l). (p) shows the difference between (n) and (o).