My newborn just recieved a chest x ray scan. how much has his life chances of cancer increased? he had a low pitch grunting noise while breathing and turned out fine. angry about exposure unnecessarily?

Zero percent: One chest x-ray changes a baby's lifetime risk of cancer by zero percent, meaning you will not notice a change. That means if you have truly identical twin babies, and take one chest x-ray of one twin but not of the other twin, the two babies at that moment will have no noticeable difference in their risks. That's how life is; never exact, and always a balance between risks and benefits.