[Retracted] Medical Image Encryption Based on 2D Zigzag Confusion and Dynamic Diffusion

Table 7

NPCR results for test images.

Tested image size M-by-N 512-by-512		NPCR critical value [40]
		Name	NPCR (%)	NPCR test results
0.05-level	0.01-level			0.001-level
CT	98.6767	Fail	Fail	Fail
MRI	98.2585	Fail	Fail	Fail
Ultrasound	98.6725	Fail	Fail	Fail
Tested image size M-by-N 1024-by-1024		NPCR critical value [40]
		Name (size)	NPCR (%)	NPCR test results
0.05-level	0.05-level			0.05-level
X-ray	98.2576	Fail	Fail	Fail
CT-kidney	98.7677	Fail	Fail	Fail