RIDER Lung CT

The RIDER Coffee-break Lung CT (RIDER Lung CT) collection was constructed as part of a study to evaluate the variability of tumor size measurements on same-day repeat CT scans in patients with non–small cell (NSCLC) lung cancer. Patients with NSCLC receiving systemic therapy consented to this Institutional Review Board (IRB)–approved prospective repeat CT can study (ClinicalTrials.gov identifier NCT00579852). Patients were accrued in the clinic by their treating oncologist. Thirty-two NSCLC patients, each of whom underwent two CT scans of the chest within 15 minutes by using the same imaging protocol, were included in this study. Each scan was reconstructed at 6 imaging settings, comprising 3 slice thicknesses (1.25 mm, 2.5 mm and 5 mm) and 2 reconstruction algorithms (lung, standard).