LIDC – IDRI is a dataset of images collected by the Lung Image Database Consortium, which includes chest CT scans and lesion annotations for diagnosis and lung cancer screening. It is a freely accessible international resource for the development, training and evaluation of computer-aided diagnosis systems for lung cancer detection and diagnosis.

The dataset was initiated by the National Cancer Institute, promoted by the National Institutes of Health, and published by the Cancer Imaging Archive and updated in 2018.