Contrast-enhanced ultrasonography parameters in neural network diagnosis of liver tumors

Table 1 Descriptive statistics of the study lot and description of the artificial neural networks classification

	HCC	Hypervascular metastasis	Hypovascular metastasis	Hepatic hemangyoma	Fatty focal change
Sex (n)
Male	30	9	5	4	16
Female	11	11	7	12	7
Age (yr), median (range)
Male	64 (52-83)	68 (45-89)	66 (42-89)	48 (32-64)	43 (31-61)
Female	66 (59-77)	62 (38-72)	62 (41-80)	50 (41-62)	44 (29-61)
Tumor size (cm), median (range)
Male	5.08 (2-10.7)	5.09 (2-13.1)	5.11 (2.1-12.7)	3.1 (2-7)	4 (2-6.5)
Female	4.8 (2.3-11)	5.7 (2-11.8)	5.6 (2-13.01)	3.2 (2-8.5)	4.6 (2-6.1)
ANN classification
HCC	38	0	0	3	0
Hypervascular metastasis	0	18	0	2	0
Hypovascular metastasis	0	0	12	0	0
Hepatic hemangyoma	1	3	0	12	0
Fatty focal change	0	0	0	0	23

When accounting for multifocal tumors, only the largest median sizes was taken into the calculation. ANN: Artificial neural networks; HCC: Hepatocellular carcinoma.