We took the simple proportionality and used it to calculate the radiation dose. The data showed there is a high correlation between the proportion of doctors and the incidence of cancer, Gofman said. Scientists have known for a long time that radiation is a mutation that can cause cancer, but the strength of radiation effects continues to be under dispute. Gofman maintains that X-rays are a contributing factor in heart disease and several types of cancer. He said medical radiation causes gene mutations that accumulate each time a patient is exposed.
Radiation causes cancer by mutating genetic data, causing tumor cells.
Over time, these cells build up to form a cancerous mass. Then 10 years down the line, the radiation-induced mutations build up and cause cancer. Further no comment was made regarding dangers of X-Ray exposure. Think you might find the attached historical book excerpt on mammography educational. You will find little that has changed, commercial concerns continue to override health issues.