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Parameter file format for mrprec

mrprec is a tool for median root prior (MRP) reconstruction. The SUN/Solaris command line version of the program is called with command
mrprec parameter_file.txt.

Format of the parameter file is following:

***
name of the input sinogram file name of the input normalization file name of the input attenuation file p1 p2 ... pN f1 f2 ... fN g1 g2 ... gN b1 b2 ... bN maximum number of iterations number of OS-sets number of iterations without prior beta maskdim zoom rotate shift_x shift_y img_dim decay_ON/OFF (1/0) name of the output image file***

Parameter meanings

name of the input sinogram file

Filename of the sinogram that will be reconstructed.

Name of the input normalization file

Filename of the normalization file. If sinogram is already normalized then leave an empty row here.

Name of the input attenuation file

Filename of the attenuation file. If sinogram is already corrected for attenuation, then leave an empty row here.

p1 p2 ... pN

Specify here the numbers of the planes that you want to reconstruct.

f1 f2 ... fN

Specify here the numbers of the frames that you want to reconstruct.

g1 g2 ... gN

Specify here the gates.

b1 b2 ... bN

Specify here the bed positions.

maximum number of iterations

Maximum number of iterations.

number of OS-sets

For MRP OS-set is usually 1.

beta

Often beta=0.3 is used for MRP.

maskdim

Often maskdim=3 is used for medianfilter (3*3=9 for 2D mask).

zoom

Reconstruction zoom factor. Preferably zoom=1. If you use other than 1, it might be wise to use the same zoom for all images of the same study.

rotate

Image will be rotated if this is other than 0.

shift_x

Image will be moved in x direction if shift_x is other than 0.

shift_y

Image will be moved in y direction if shift_y is other than 0.

img_dim

Size of the image (in pixels). For example if you wan't a 128x128 size image set img_dim=128.

decay_ON/OFF (1/0)

Set 1 if sinogram is not decay corrected (it usually isn't) and 0 if it is.

Name of the output image file

Specify a name for reconstructed image file.

Example of a parameter file:

s04120dy1.scn 991122_norm.nrm s04120tr1.atn 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 0 150 1 1 0.3 3 1 0 0 0 128 1 s04120dy1_mrp.img