Table 5:

Quantitative analysis: signal, image noise, and SNR in ULDCT, LDCT, and SDCT^{^a}

	ULDCT	SDCT	P	LDCT	SDCT	P	ULDCT	LDCT	P
S (HU)	32.94 ± 4.16	29.59 ± 4.97	.007	31.67 ± 4.27	29.59 ± 4.97	.359	32.94 ± 4.16	31.67 ± 4.27	.320
IN (HU)	5.05 ± 0.92	4.40 ± 0.89	.001	3.81 ± 0.40	4.40 ± 0.89	.154	5.05 ± 0.92	3.81 ± 0.40	.003
SNR	6.71 ± 1.38	6.91 ± 1.45	.251	8.35 ± 1.2	6.91 ± 1.45	.164	6.71 ± 1.38	8.35 ± 1.2	.001