.SELECTION DOC FILE: SELECT
[Enter the name of the document file containing projection
file numbers in the first column.]
.ANGULAR DOC FILE: ANGLES
[Enter the name of the document file containing Eulerian
angles for the projections used (psi, theta, phi).
Only theta is actually used, psi and phi are ignored.]
.RADIUS OF RECONSTRUCTED OBJECT, HEIGHT OF THE SLICE: 45,30
[The reconstruction is calculated for the circle only
and within the slab of specified height. This height is
NSLICE dimension of resulting 3D volume.]
.RECONSTRUCTION FROM NROW1 TO NROW2: 2,73
[The reconstruction is calculated between specified
nrow borders. Default is nrow1=1, nrow2=nrow.
3D volume will have dimensions:
NSAM, NROW2-NROW1+1, height of the slice
where NSAM is original 2D projection dimension.]
.LAMBDA, CORRECTION LIMIT: 1.0e-4,0.0
[Lambda determines the weight of corrections. Too small
value results in long time of calculations, too large
value will terminate the iterations too soon.]
.ITERATION LIMIT, NUMBER OF INTERNAL STEPS: 20,5
[Program will terminate after number of iterations given.
For each iteration there is specified number of iterations
per slice performed (internal steps). Thus, the total
number of steps is the product of two numbers.
In the above example it is 20*5=100.
Min and max constraints are enforced during each internal
step, but smoothing is applied only pnce per main iteration
(20 times in the example).
If no smoothing is requested the iteration limit should
be equal 1, and the all the iterations requested
should be specified as internal steps.
Usually 50 steps are sufficient.]
.MODE: 8
[Mode determines the constraints used:
1 - smoothing,
2 - min constraint,
5 - max constraint.
Any combination of constraints can be used. The mode answered
should be the sum of any single modes, for example mode=7
activates both min and max constraints, mode=8 all three of them.]
.MINIMUM, MAXIMUM: 1.77,1.90
[Values of min and max constraints. They relate to the values
in 2D projection data.]
.SMOOTHING CONSTANT : 0.5
[Smoothing constant has to be 0<s<1. s=0 corresponds to no
smoothing, s=1 is strong low-pass filtration.]
.3-D OUTPUT FILE: uuu101
[Name of the output file.]
NOTES