COS(THETA)COS(PHI) COS(THETA)SIN(PHI) -SIN(THETA) -SIN(PHI) COS(PHI) 1If, for example, you have a single-axis tilting series with Y as the tilt axis, use 'BP WX' to weight the projections perpendicular to the tilt axis and define only THETA in the back projection step.
.IS THIS A NEW 3D? (Y/N): Y
.FIRST,LAST SLICE TO BE RECONSTRUCTED: 10,50
[Self-explanatory.]
.SLICE INTERVAL: 1
[Enter the steps between the slices to be calculated.
This allows for the reconstruction, for example, of every
second slice. However, the slices not calculated are
still part of the reconstructed volume, and contain 0
density.]
.ENLARGEMENT FACTOR: 1
[Since the dimensions of the volume are independent of
those of the projections, different grids for the
reconstruction volume and the projections may be defined by the
enlargement factor. The default=1.0]
.FIRST PROJECTION FILE: PRO001
.LAST PROJECTION FILE: PRO020
[Enter the names of the first and last projections.]
NOTES