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. Author manuscript; available in PMC: 2018 Jul 1.
Published in final edited form as: J Cardiovasc Comput Tomogr. 2017 Mar 22;11(4):249–257. doi: 10.1016/j.jcct.2017.03.002

Table 4.

Comparative quantitative image quality of 2nd and 3rd generation DSCT.

2nd generation DSCT (N=123) 3rd generation DSCT (N=123) p-value
Image noise (HU) 31.9 [27.0–42.4] 55.9 [46.6–61.4] <0.001
pRCA signal (HU) 431.0 [350.0–547.0] 599.0 [441.0–726.0] <0.001
pRCA SNR 13.3 [11.0–15.8] 10.9 [9.5–12.6] <0.001
pRCA CNR 15.2 [13.2–18.3] 12.5 [11.1–14.3] <0.001
LM signal (HU) 426.0 [362.0–535.0] 586.0 [465.0–764.0] <0.001
LM SNR 13.5 [11.0–15.5] 11.2 [9.9–13.4] <0.001
LM CNR 15.2 [12.8–17.9] 12.4 [10.9–14.8] <0.001
Distal LAD SNR 10.7 [8.7–13.1] 8.8 [7.2–10.6] <0.001
Distal RCA/LCX SNR 12.0 [9.9–14.9] 10.7 [8.6–12.7] <0.001