Table 1.

Data availability of four datasets.

	LIDC-IDRI	LUNA16	NLST	NELSON
Total number	1018 scans/1010 patients	888 scans	54,000 participants	7557 participants
Format of CT images	DICOM	MHD and Raw	DICOM	DICOM
Slice thickness of CT images	0.5–5 mm	≤2.5 mm	1.0–3.2 mm	1.0 mm
Demographic description	–	–	+	+
Follow-up	–	–	+	+
Pixel based annotation of lung nodule	+	+	–	–

+Available; -: Not available.