Table 8.

Summary of classification methods used by different papers both for CT and X-ray images

Classification methods	Papers	Count
Binary classification	[12, 15, 16, 21, 23, 25, 27, 28, 31–34, 38, 41, 42, 44, 46–49, 56–59, 61, 62, 68, 71, 72, 75, 77–79, 81–85, 87, 88, 90–92]	43
Multiclass classification	[3, 13, 14, 16, 17, 22, 24, 28, 29, 35–37, 39, 40, 42, 45, 49–54, 60, 63–66, 69, 70, 73, 74, 76, 79, 81, 84, 86, 89]	37