Deep self-organizing competitive neural network for magnetically controlled capsule endoscopy-based auxiliary diagnosis of clinically significant gastric lesions

Table 1 Statistical analysis of the constructed dataset

		Symptoms
		AP	AD	ADis	H	AR	GERD	Hem
Feature	Mean	810	341	714	60	193	113	121
	Women	1176	417	923	74	265	134	94
	Total	1986	758	1637	134	458	247	215
	Age interval	9-99	14-92	12-92	23-87	13-88	13-92	22-93
Report	GC	11	4	11	1	1	3	0
	AG	35	21	53	9	16	9	7
	GU	146	41	89	6	26	10	30
	GP	217	111	204	15	45	42	28
	NAG	203	77	202	23	61	57	12
	SG	1618	580	1242	103	347	155	184
	AGM	83	28	65	8	25	12	15
	YWM	60	20	47	8	15	10	11
	VV	4	1	0	1	1	0	3
	BS	51	19	34	4	11	3	40
	AGA	157	85	191	22	66	27	30
	OGA	20	11	11	5	7	3	2
	BR	820	328	721	53	207	103	63

AP: Abdominal pain; AD: Abdominal distension; ADis: Abdominal discomfort; H: Heartburn; AR: Acid regurgitation; GERD: Gastroesophageal reflux; Hem: Bleeding; GC: Gastric cancer; AG: Atrophic gastritis; GU: Gastric ulcer; GP: Gastric polyps; NAG: Non-atrophic gastritis; SG: Erosive gastritis; AGM: Abnormal gastric mucosa; YWM: Yellow-white macules; VV: Varices; AGA: Abnormal gastric antrum; OGA: Other gastric abnormalities; BR: Bile reflux.

Table 2 Accuracy analysis in different dataset

		Conventional			DSomNN
Type	Number	Normal	Need	Rate, %	Normal	Need	Rate, %
a∗	n = 500	402	98	19.60	410	90	18.00
b∗	n = 500	399	101	20.20	401	99	19.80

The data of a∗ samples from intubation gastroscope, and the data of b∗ samples from magnetically controlled capsule endoscopy. DSomNN: Deep self-organizing competitive neural network.

Table 3 Accuracy and available performance metrics in different datasets

Dataset	Reference standard	n	Expert-identified significant cases, %	Correctly identified	Sensitivity
Test Set a	Conventional endoscopy/pathology	500	98 (19.60)	92	93.88
Test Set b	MCCE	500	101 (20.20)	94	93.07

MCCE: Magnetically controlled capsule endoscopy.

Table 4 Regression testing

Year	Test samples	Detection number	Detection rate, %
2017	732	146	19.95
2018	1439	275	19.11
2019	1714	334	19.49
2020	1310	256	19.54
2021	1275	247	19.37
2022	700	134	19.14