Table 5.

Distribution of noise and SNR with MP and AP of different lesion locations in chest CT

Lesion location	All lesions (n, MP/AP)	Noise		SNC		p value
		MP	AP	MP	AP	Noise	SNC
Central	25/30	135.7 ± 54.1	132.6 ± 59.4	6.3 ± 2.7	6.6 ± 3.2	0.819	0.739
Peripheral	766/927	151.4 ± 66.9	137.5 ± 64.2	5.3 ± 3.3	6.1 ± 3.6	< 0.001	< 0.001

Data are mean ± SD, where n is the amount of the pulmonary lesions with available data. MP, manual positioning; AP, AI-based automatic positioning; SNR, signal-to-noise ratio