Empirical Driven Automatic Detection of Lobulation Imaging Signs in Lung CT

Table 2

The experimental results of our designed algorithms.

(a)

	Step size
	1	2	4	6	8	10	12	14	16
A1
SNTP	4	0	0	0	0	0	0	0	0
APPI	7.5	7.8	7.3	7.4	7.8	7.5	7.5	7.3	7.8
Recall	25%	0	0	0	0	0	0	0	0
Precision	2.92%	0	0	0	0	0	0	0	0
F1 score	0.0522

(b)

	Step size
	4	6	8	10	12	14	16	18	20
A2
SNTP	14	12	11	9	7	7	5	3	4
APPI	223.5	96.1	55	35.6	20.9	16.8	13.4	11.9	9.6
Recall	87.5%	75%	68.75%	56.25%	43.75%	43.75%	31.25%	18.75%	25%
Precision	2.43%	2.15%	2.5%	2.11%	2.69%	3.36%	2.79%	1.58%	3.25%
F1 score	0.0473	0.0417	0.0482	0.0407	0.0508	0.0624	0.0512	0.0291	0.0575
A3
SNTP	0	0	0	0	0	0	0	0	0
APPI	0.2	0	0.1	0.1	0	0	0	0	0
Recall	0	0	0	0	0	0	0	0	0
Precision	0		0	0
F1 score
A4
SNTP	0	0	0	0	0	0	0	0	0
APPI	1.9	0.8	0.6	0.1	0.1	0.3	0.2	0.1	0
Recall	0	0	0	0	0	0	0	0	0
Precision	0	0	0	0	0	0	0	0
F1 score
A5
SNTP	14	9	10	8	6	4	3	0	2
APPI	190.2	84.9	49.4	27.4	19.8	15.8	12.9	10.5	6.1
Recall	87.5%	56.25%	62.5%	50%	37.5%	25%	18.75%	0	12.5%
Precision	2.37%	1.77%	2.41%	1.82%	2.85%	1.59%	1.45%	0	2.06%
F1 score	0.0461	0.0343	0.0463	0.0352	0.0529	0.0299	0.0269		0.0354
A6
SNTP	12	10	9	9	4	5	6	2	2
APPI	198.6	83.6	49.1	30.6	18.9	16.9	12.25	11.1	7.8
Recall	75%	62.5%	56.25%	56.25%	25%	31.25%	37.5%	12.5%	12.5%
Precision	2.33%	2.39%	2.54%	2.66%	1.99%	1.85%	4.08%	1.13%	2.42%
F1 score	0.0452	0.0461	0.0487	0.0508	0.0368	0.0348	0.0736	0.0207	0.0405
A7
SNTP	10	6	5	1	3	2	0	0	0
APPI	25.1	9.9	6.1	3.7	3.3	1.9	1.3	1.1	1.1
Recall	62.5%	37.5%	31.25%	6.25%	18.75%	12.5%	0	0	0
Precision	5.49%	5.03%	5.15%	1.69%	5.66%	6.67%	0	0	0
F1 score	0.1009	0.0887	0.0885	0.0267	0.0870	0.0870
A8
SNTP	16	16	15	10	10	7	7	7	5
APPI	564.5	257.8	140.3	87.4	66.3	46.2	37.8	28.8	21.1
Recall	100%	100%	93.75%	62.5%	62.5%	43.75%	43.75%	43.75%	31.25%
Precision	1.38%	1.38%	1.20%	1.0%	1.23%	1.22%	1.32%	1.52%	1.48%
F1 score	0.0273	0.0273	0.0238	0.0197	0.0241	0.0237	0.0257	0.0294	0.0283
A9
SNTP	16	16	13	12	11	9	11	13	7
APPI	580.2	259.6	149.4	92.1	62.4	43.3	35.3	30.1	22.4
Recall	100%	100%	81.25%	75%	68.75%	56.25%	68.75%	81.25%	43.75%
Precision	2.09%	2.31%	2.0%	2.17	2.61%	2.16%	2.84%	3.11%	2.23%
F1 score	0.0409	0.0452	0.0392	0.0420	0.0502	0.0417	0.0545	0.0599	0.0424
A10a
SNTP	16	16	14	8	10	7	5	6	4
APPI	368.5	170.1	91.1	56.1	45.3	28.1	24.1	19.3	13.9
Recall	100%	100%	87.5%	50%	62.5%	43.75%	31.25%	37.5%	25%
Precision	1.76%	1.84%	1.58%	1.0%	1.66%	1.78%	1.30%	1.94%	1.79%
F1 score	0.0347	0.0361	0.0310	0.0197	0.0322	0.0342	0.0249	0.0369	0.0335
A10b
SNTP	15	16	13	12	11	9	10	11	5
APPI	447.8	200.1	114.4	70.1	48.1	35.1	26.9	22.3	16.8
Recall	93.75%	100%	81.25%	75%	68.75%	56.25%	62.5%	68.75%	31.25%
Precision	2.25%	2.59%	2.24%	2.32%	2.60%	2.50%	3.25%	3.37%	2.24%
F1 score	0.0439	0.0505	0.0436	0.0500	0.0501	0.0478	0.0618	0.0643	0.0418