VAMEA | VisionX V4 |
vamea − segment the aortic or pulmonary artery surface
SYNOPSISvamea if=<mappedintensity> ig=<mappedintensity> ih=<imgfile> of=<imgfile> of2=<meshfile> of3=<vectorfile> od=<vectorfile> si=<interval> px=<x3,x2,x1,x0> py=<y3,y2,y1,y0> pz=<z3,z2,z1,z0> sc=<xs,ys,zs> rx=<x> ry=<y> rz=<z> -p -w -v -r
DESCRIPTIONvamea vairmea finds vessel (aorta or pulmonary artery) surface. First a set of rays is cast perpendicular to the surface of the triangular model (vcylmodel) and the values along the rays are sampled (vairmap). Each ray is evaluated with its 12 neighbors. Then for each ray a termination point is determined based on specified conditions (intersect with a labeled voxel or intensity value less than -30HU). The termination point is on the vessel surface and is at the center of each triangle. They can be used to compute the vertices of all triangles in the model. The output of= is the visualization of all rays. of2= is all vertices points computed using the termination points. of3= outputs the vertices points in a vector format with information of which ring of triangle a vertice point belongs to. If the option -r and rx, ry, rz are specified, the program takes in the coordinate of a point (rx,ry,rz), finds the ray it is on (or close to) and outputs the values of the 12 neighboring rays in od=. If the option -p is specified, a more relaxed surface condition is used for pulmonary artery surface detection (default is aorta surface).
Input file if= and ig= are output from vairmap. ih= is the CT image and is only for visualization purpose. of= is the output visualization image. of2= has vertices of all triangles (converted from centerpoints of triangles). of3= has vertices and the ring of triangles they belong to. si, px, py, pz should be he same as what vairmap uses.
OPTIONS|
if= |
original CT image mapped to a triangular model (vairmap) | ||
|
ig= |
label map image mapped to a triangular model (vairmap) | ||
|
ih= |
original CT image | ||
|
of= |
output image with visualization of rays | ||
|
of2= |
a VX_V3D file showing the vertices of all triangles | ||
|
of3= |
a VX_GFLOAT file with vertices and their locations | ||
|
od= |
12 neighbors of a particular ray (-r option) | ||
|
si= |
sampling interval (mm space) px,py,pz= polynomial coefficients (output of vapoly) rx,ry,rz= a point of interest (-r option) | ||
|
-r |
option to output rays closest to a surface point (rx,ry,rz) | ||
|
-p |
option for pulmonary artery surface detection (default is aorta) |
vcylmodel(1),vapoly(1),vairmap(1)
AUTHORJ. Lee, Y. Xie