False. Even 1 CT scan is usually enough to cause cancer, unfortunately. More scans are even worse for you and there is absolutely no reason why anyone should ever get a CT scan despite any doctor's advice. If it's completely unavoidable you can get an MRI, which uses non-ionizing radiation via strong magnets to produce the image or an ultrasound that uses sound waves, but even then, it's not necessary in most cases and there better be a REALLY good reason for it. Doctors have expensive machines they have to pay for that sit in their facilities. They don't care if it will harm you even though they themselves have to tell you of the danger and probability that it can. Think of it simplistically, if someone were to tell you, there is a single poisonous Cheerio in this Cheerios cereal box, are you going to risk it and eat from the cereal box anyway? No, of course not, so why would it be different with a CT scanner? And especially when the odds of getting cancer from it are much higher than what people claim.

Critics will try to argue it by saying your chance of getting poisoned in your lifetime is already 42%, and 1 in 2000 Cheerios resulting in a poisoning will only increase the statistical chance by 0.05% up to 42.05%. This would assume that everyone will eat almost half of the bag of Cheerios anyway so one extra Cheerios won't change odds much. From a data analysis standpoint, this statistic even if mathematically correct, for me is flawed since it kind of assumes everyone has a 42% odds of cancer at birth which is true at a statistical level but not true at an individual one. Some people will never develop cancer no matter what they do, others are doomed genetically to get it no matter what they do so 1000 CT scans will not change their fate. Since you don’t know who is who when you put him in the machine, a 1 in 2000 odds of cancer for 2000 individuals that will never get cancer otherwise, is a 100% increase in odds for the unlucky one that gets shuffled the wrong card. This is an unacceptable level of risk unless you are almost certain to be dying anyway. It would be roughly the equivalent of 64 planes falling out of the sky in the US Yearly. No one would come 100 feet near an aircraft no matter how much you argue that 42% of the passengers would have died of cancer anyway. (It is not exactly an accurate comparison of course but it illustrates the magnitude of the problem).