Pulmonary Lobe Segmentation in CT Images Based on Lung Anatomy Knowledge

Table 1

Volumetric overlapped results. In this section, LUL, LLL, RUL, RML, and RLL are used to represent the left upper lobe, left lower lobe, right upper lobe, right middle lobe, and right lower lobe, respectively. We divide all cases into two parts: normal groups and abnormal groups.

	LUL	LLL	RUL	RML	RLL	Group
Case 1	0.994	0.970	0.985	0.981	0.990	Normal
Case 2	0.937	0.999	0.999	0.998	0.977	Normal
Case 3	0.996	0.994	0.998	0.969	0.986	Normal
Case 4	0.992	0.990	0.981	0.954	0.960	Normal
Case 5	0.986	0.992	0.984	0.918	0.985	Normal
Case 6	0.990	0.972	0.992	0.928	0.987	Normal
Case 7	0.933	0.990	0.994	0.944	0.993	Normal
Case 8	0.999	0.994	0.984	0.969	0.991	Normal
Case 9	0.834	0.992	0.990	0.947	0.992	Abnormal
Case 10	0.998	0.986	0.982	0.864	0.979	Abnormal
Case 11	0.989	0.995	0.891	0.956	0.989	Abnormal
Case 12	0.998	0.992	0.948	0.915	0.990	Abnormal
Case 13	0.988	0.999	0.999	0.845	0.980	Abnormal
Case 14	0.999	0.989	0.883	0.942	0.995	Abnormal
Case 15	0.957	0.980	0.985	0.663	0.985	Abnormal
Average	0.960	0.989	0.973	0.920	0.985
Maximum	0.999	0.999	0.999	0.998	0.995
Minimum	0.834	0.970	0.883	0.663	0.960
Median	0.990	0.992	0.985	0.944	0.987
Standard deviation	0.058	0.009	0.037	0.082	0.009