On the advice of our family Dr, because of age, family history and it was free, she suggested my husband have a cancer scan. He had one in October 2016. They found many nodules in his lungs and sent us to a pulmonary Dr. He wanted to wait 3 months and repeat the scan, in the mean time, he had a PET scan done and nothing glowed. In Feb 2017 he had another scan done, none of the nodules changed except one, it had doubled in size. He said where the tuner was it was very deep and next to a large blood vessel.