European Radiology Experimental

Table 2 Noise magnitude obtained for the low energy levels on virtual monoenergetic images (VMIs) and three reconstruction levels of both versions of deep learning spectral reconstruction (DLSR)

From: Comparison of image quality of two versions of deep-learning image reconstruction algorithm on a rapid kV-switching CT: a phantom study

DLSR version	Energy level	Reconstruction level
DLSR version	Energy level	Mild	Standard	Strong
DLSR V1	40 keV	100.2 ± 0.40	86.6 ± 0.35	65.6 ± 0.31
	50 keV	52.4 ± 0.32	45.3 ± 0.22	34.3 ± 0.28
	60 keV	24.3 ± 0.09	21.0 ± 0.13	15.5 ± 0.19
	70 keV	12.5 ± 0.10	10.6 ± 0.08	7.7 ± 0.12
DLSR V2	40 keV	68.5 ± 0.20	55.1 ± 0.27	44.6 ± 0.41
	50 keV	34.3 ± 0.10	28.1 ± 0.14	22.7 ± 0.21
	60 keV	16.6 ± 0.04	13.6 ± 0.07	10.9 ± 0.10
	70 keV	13.1 ± 0.04	10.6 ± 0.05	8.1 ± 0.08

Data are given as mean ± standard deviation

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