Application of CT Image Technology Based on Nearest Neighbor Propagation Clustering Segmentation Algorithm in Lung Cancer Radiotherapy

Figure 2

The target area outlined in 3 ways. Note. The green line is GTV-CT, the red line is GTV-PET auto, the yellow line is GTV-PET, and the red line and the yellow line almost overlap.

(a)

(b)

(c)

(d)

(e)

(f)