Table 2.

Summary of different type of lung disease and normal (healthy patients) CT images used by papers

Paper	Normal	Pneumonia	COVID-19	Total images
[3]	175	224	219	618
[64]	86	100	88	274
[73]	N/A	14,469	20,886	35,355
[74]	1325	1735	1296	4356
[75]	N/A	1027	1658	2685
[76]	91	NS	877	1418
[12]	100	N/A	106	206
[68]	N/A	40	1266	1306
[65]	28,873	30,345	14,944	89,628
[31]	153	N/A	203	356
[14]	1126	N/A	938	2064
[15]	6000	N/A	6000	12,000
[16]	247	N/A	178	425
[77]	N/A	N/A	150	150
[78]	75,541	N/A	64,771	140,312
[79]	397	N/A	349	746
[80]	195	N/A	275	470
[21]	339	N/A	391	730
[18]	N/A	N/A	373	373
[81]	495	N/A	449	944
[19]	N/A	N/A	100	100
[82]	NS	740	325	1065
[56]	344	N/A	439	783
[83]	N/A	1027	1495	2522
[84]	397	N/A	349	829
[13]	3308	2296	2228	7832
[85]	463	N/A	349	812
Total	120,438	50,268	121,700	308,359