= {
" ",
"Usage: radonrecon [options] input.star [input.star]",
"---------------------------------------------------",
"Program to reconstruct a quarter (PI*PI) radon transform from projections.",
"Projections must be square.",
" ",
"Parameters:",
"-verbose 7 Verbosity of output",
"-datatype u Force writing of a new data type (default output floating point)",
"-origin 32,32 Projections origin (default center of projections)",
"-sampling 1.5,1.5,1.5 Sampling (A/pixel; a single value can be given).",
"-kernel 15,4 Kernel size and power (default 11,2)",
"-threshold 19.4 Threshold for accepting a particle image (default 0)",
"-symmetry D5 Number of symmetry equivalents (default 1)",
" ",
"Output:",
"-output file.star Output parameter file.",
"-reconstruction rec.map Reconstruction file name.",
"-mask mask.map Binary mask for POCS filter.",
" ",
NULL
}