. 2014 Nov;35(11):2052–2057. doi: 10.3174/ajnr.A4019

Table 4:

Image noise, signal-to-noise ratio, and contrast-to-noise ratio for each imaging technique^a

	Noise	SNR_b	CNR_(b/m)	CNR_(b/a)	CNR_(m/a)
CT	29.28 ± 9.39	100.35 ± 33.1	97.03 ± 31.63	163.80 ± 54.81	66.76 ± 23.31
Conebeam CT	46.76 ± 15.84	25.33 ± 16.73	28.45 ± 18.11	50.46 ± 31.9	22 ± 14
Difference	17.48^b	75.02^b	68.58^b	113.34^b	44.76^b

Note:—SNR_b indicates SNR of the bone; CNR_(b/m), contrast between the bone and the muscle-to-noise ratio; CNR_(b/a), contrast between bone and air; CNR_(m/a), contrast between muscle and air.

Data are median values ± SD.

P < .001.