Can a chest MRI detect lung cancer? I had a contrast chest CT scan, and the reports came back normal, but after a month, I developed a cough and sputum that lasted for two weeks. The coughing stopped, but sometimes I still get gray-colored sputum and feel pain around my lower ribs and shoulder blade. Is this a sign of lung cancer? I looked it up online, and now I'm concerned. Can an MRI better detect if something's wrong? I've attached my CT scan reports.