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

Table 1

Comparison of target volume under different sketching methods.

Sketching method	CT image target volume	PET image target volume	t value	value
Doctor manually sketch	GTV-CT (161.43 ± 139.30)	GTV-PET (146.20 ± 101.32)	3.431	<0.05
PCNN automatic segmentation	GTV-PET auto
t value	(142.54 ± 120.73) 0.763
value	>0.05