NAME¶

pjrec — reconstruction from projections

SYNOPSIS¶

DESCRIPTION¶

pjrec takes projection data from projection-file and produces an (IF) image file image-file, of size nx-image by ny-image pixels, containing the reconstructed image.

Every tool is run through ctsim-nogui, as in "ctsim-nogui pjrec ...", or directly if a symbolic link of that name points at it.

The arguments and options are as follows:

image-file

Output image file in SDF2D format

nx-image

Number of columns in output image

ny-image

Number of rows in output image

--interp

Interpolation method during backprojection

nearest

Nearest neighbor interpolation

linear

Linear interpolation (default)

cubic

Cubic interpolation

--preinterpolate

Preinterpolation factor (default = 1)

--filter

Filter name

abs_bandlimit

Abs * Bandlimiting (default)

abs_sinc

Abs * Sinc

abs_cosine

Abs * Cosine

abs_hamming

Abs * Hamming

abs_hanning

Abs * Hanning

shepp

Shepp-Logan

bandlimit

Bandlimiting

sinc

Sinc

cosine

Cosine

triangle

Triangle

hamming

Hamming

hanning

Hanning

--filter-method

Filter method before backprojections

convolution

Spatial filtering (default)

fourier

Frequency filtering with discete fourier

fourier_table

Frequency filtering with table lookup fourier

fft

Fast Fourier Transform

fftw

Fast Fourier Transform West library

rfftw

Fast Fourier Transform West (real-mode) library

--zeropad

n Set zeropad level (default = 0)

--filter-generation

Filter Generation mode

direct

Use direct filter in spatial or frequency domain (default)

inverse_fourier

Use inverse fourier transform of inverse filter

--backproj

Backprojection Method

trig

Trigometric functions at every point

table

Trigometric functions with precalculated table

diff

Difference method

idiff

Difference method with integer math [default]

--filter-param

Alpha level for Hamming filter

--trace

Set tracing to level

none

No tracing (default)

console

Text level tracing

--verbose

Report progress and details while running.

--version

Print the CTSim version and exit.

--help

Print the usage summary and exit.

SEE ALSO¶

ctsim-nogui(1), ctsim(1)

The CTSim manual, installed as /usr/share/doc/ctsim/ctsim.pdf and ctsim.html and available from the Help menu of ctsim.

AUTHORS¶

Kevin M. Rosenberg <kevin@rosenberg.net>