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Risk vs. Benefit

Mayo Clinic CT Screening Trial

< 3mm pulmonary nodule

       – 0.2% malignant

4-7 mm pulmonary nodule

       – 0.9% malignant

8-20 mm pulmonary nodule

       – 18% malignant

>20 mm pulmonary nodule

       – 50% malignant

Click here for a Radiation Risk Calculator