Table 2.

Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) calculations.

		Dose25			Dose50			Dose75
	AD3	AD5	FBP	AD3	AD5	FBP	AD3	AD5	FBP
Signal-to-noise ratio
Sternocleidomastoid muscle Submandibular gland	4.4 ±1.7 5.7 ± 2.4	5.9 ± 2.3 7.5 ± 2.9	3.0 ± 1.0 4.5 ± 1.6	5.5 ± 1.9 6.8 ± 2.6	7.3 ± 2.9 8.6 ± 3.5	4.0 ± 1.4 5.3 ± 1.9	6.3 ± 2.4 7.5 ± 2.9	8.4 ± 3.2 9.3 ± 4.3	4.7 ± 1.7 5.9 ± 2.2
Contrast-to-noise ratio
Sternocleidomastoid muscle fat Submandibular gland fat	7.9 ± 3.5 9.4 ± 4.6	11.1 ± 4.9 13.1 ± 6.4	6.1 ± 2.2 7.3 ± 3.0	10.4 ± 3.3 12.2 ± 4.2	14.6 ± 8.3 16.9 ± 9.1	7.9 ± 2.5 9.2 ± 3.3	12.3 ± 4.6 14.5 ± 6.0	15.7 ± 5.9 18 ± 7.8	9.3 ± 2.9 10.9 ± 3.9

Dose 25, 50, and 75 indicates the percentage of the original dose values; AD3 = ADMIRE 3; AD5 = ADMIRE 5; FBP = filtered back projection.