| BP 3F | [Back Projection - 3D, Interpolated in Fourier space ||*] |
| BP CG | [Back Projection - 3D, Iterative, Conjugate Gradients ||*] |
| BP R2 | [Back Projection - Weight image series ||] |
| BP RP | [Back Projection - 3D, iterative, Richardson, constrained ||*] |
| BP S2 | [Back Projection - 2D, single tilt, iterative, constrained ||] |
| BP W2 | [Back Projection - 2D, filtered, weighted ||] |
.FILE NUMBERS OR SELECTION DOC. FILE NAME: 1-700
[Enter projection file numbers or the name of the document
file which contains the projection file numbers in its
first register column.]
.ANGLES DOC FILE: ANGLES27
[Enter name of the document file which contains Eulerian
angles: psi, theta, and phi in the first three registers
columns.]
.SYMMETRIES DOC FILE: symmetries
[If there are no symmetries, enter symbol "*".
Otherwise, enter the name of the document file containing Eulerian angles
defining symmetries (psi, theta, phi). The angles should be
such that when used in operation 'RT 3D' transform the volume
into itself. The identity operation (angles 0,0,0) MUST be included.
The symmetries are enforced in two steps: projections related by the
symmetry operations are added in Fourier space to the volume; in order
to reduce the residual artifacts, additional real-space symmetrization
is applied.]
.RECONSTRUCTED 3-D FILE: VOLUME1001
[Name of the output file.]
NOTES