VPVHRT

vpvhrt − estimates location of the pulmonary vessel above heart.

vpvhrt if=<scan> map=<chestmap> amap=<aorta> of=<outmap> -d -v

vpvhrt takes in the standard chest map and the segmented aorta with 5 segments labeled differently (intermediate output from aorta segmentation). The two maps are combined into a single map and converted to sagittal view. Then vpvhrt calls vhtop which computes the estimated two ends of the pulmonary vessel above aorta. The two ends are represented by their respective centerpoint and estimated radius (x1,y1,z1,r1) and (x2,y2,z2,r2) in the sagittal view. Using the two centerpoints, vhtrk is used to estimate the centerline of the pulmonary vessel. Based on the estimated centerline, a cylinder with constant radius is used to represent the pulmonary vessel. The radius is equal to min(r1,r2) and has to be at least 10mm. vpvhrt outputs a map with the labeled pulmonary vessel model. It also prints out the lowest point (closest to heart surface) of the cylinder model (converted to axial space).

Input file if is the CT scan. Input file map the standard label map. Input file amap is the segmented aorta with 5 segments in 5 different labels. Output file is the label map with pulmonary vessel model labeled as dev4. It also prints the z coordinate of the cylinder point that is closest to heart top.

vaseg(1), vhtop(1), vhtrk(1), vhmea(1), vhcvt(1)

Y. Xie