Table 4.

Results for quantitative image analyses

		DLR	Hybrid IR	P-values
Image noise	Lateral ventricle	2.76 ± 0.49	3.15 ± 0.52	< 0.001
	Putamen	2.45 ± 0.76	3.34 ± 0.88	< 0.001
	White matter	2.23 ± 0.49	3.38 ± 0.61	< 0.001
Contrast		13.5 ± 7.3	9.9 ± 5.0	< 0.001
CNR		6.5 ± 3.6	3.0 ± 1.8	< 0.001

CNR contrast-to-noise ratio; DLR deep learning reconstruction; Hybrid IR hybrid iterative reconstruction

Contrast was the difference of the CT attenuation between lesion and white matter

Contrast-to-noise ratio was calculated with contrast divided by image noise in lateral ventricle

Comparisons were performed with the paired t-test