VSFIT

VisionX V4
NAME

vsfit − VisionX script for segmenting the juxtapleural pulmonary nodules

NAME SYNOPSIS

vsfit [if=<infile>] [ig=<infile>] [of=<outfile>] [th=<value>] [sf=<file>] [tk=<value>] [s=<value> [sd=<value>] [ic=<value>] [m=<value>] -e -v -neg -od -f

DESCRIPTION

Vsfit segments the juxtapleural pulmonary nodule from a gray scale region of interest image in byte format. The output is a binary image containing the nodule region

OPTIONS (standard operation)

if=

input file name -- the region of interest image

ig=

the thresholded nodule (for -e option)

of=

output image: the nodule region is set to 255 the rest of the points are set to zero.(requires some post processing)

ic=

coordinates of a point inside the nodule

s=

size of morphological filter used for vessel removal

OPTIONS (should work fine when these are set to defaults)

m=

surface model options are pl->planar qd->quadratic cu->cubic qr->fourth order (default: CU)

sf=

the surface file output

tk=

thickness of the surface drawn if the -od option is set if -od is not set than a layer of width "tk" around the surface function is excluded from the nodule segmentation (default: 2)

sd=

size of morphological filter used for post processing set to (default: set to value of s)

th=

threshold (not used for -e) default=100

-e

use an existing thresholded/segmented image as input

-v

verbose mode

-neg

outputs a 3 level image with lung parenchyma, thoracic wall and nodule at different gray levels

-od

outputs an image with the pleural surface drawn on top

-f

keep temp files

RELATED PROGRAMS

vplfit

the C program for surface fitting using linear regression

v3grad

3D gradient operator used to find the average surface normal

vsborder

small utility program to set the pixel values to zero at the boundaries of the image

AUTHOR

Y. Mulman