********* EXAMPLE 8
* RECONSTRUCTION OF HEAD PHANTOM USING LINOGRAM AND FILTERED
* BACKPROJECTION METHODS. SINC FILTER FOR LINOGRAM AND COSINE 
* FILTER FOR FBP.
*
create
EXAMPLE 8 LINOGRAM RECONSTRUCTION 
spectrum monochromatic 75
objects    cx          cy          u           v         ang         den
elip      0.000       0.000     8.625        6.4687     90.00      0.416
elip      0.000       0.000     7.875        5.7187     90.00     -0.206
elip      0.000       1.500     0.375        0.3000     90.00     -0.003
elip      0.675      -0.750     0.225        0.1500    140.00      0.010
elip      0.750       1.500     0.375        0.2250     50.00      0.003
segm      1.375      -7.500     1.100        0.6250     19.20     -0.204
segm      1.375      -7.500     1.100        4.3200     19.21      0.204
segm      0.000      -2.250     1.125        0.3750      0.00     -0.003
segm      0.000      -2.250     1.125        3.0000      0.00      0.003
segm     -1.000       3.750     1.000        0.5000    135.00     -0.003
segm     -1.000       3.750     1.000        3.0000    135.00      0.003
segm      1.000       3.750     1.000        0.5000    225.00     -0.003
segm      1.000       3.750     1.000        3.0000    225.00      0.003
tria      5.025       3.750     1.125        0.5000    110.75      0.206
tria     -5.025       3.750     1.125        0.9000   -110.75      0.206
last    1.0
phantom average 5
115    0.1504
raysum average 1
1
geometry
linogram
measurement perfect
background absorption is 0.0
run
picture test
projection real
execute lino
EXAMPLE 8a LINOGRAM METHOD
sinc 1.0 
execute conv
EXAMPLE 8b FILTERED BACKPROJECTION
cosine 1.0 2 
end