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Lung cancer expert Dr. Abbie Begnaud explains how lowdose CT can detect lung cancer. She explains how your radiologist and healthcare team will evaluate the results of your lowdose CT scan and look for spots (called nodules) that are not supposed to be there. Nodules will be examined for various features, including their number, size, shape, and opacity, resulting in a score that can be used as a gauge to determine followup recommendations and next steps.