###Human: Can radiation exposure during x-ray cause cancer? ###Assistant: Hi. X-ray and CT scan uses ionizing radiation. Though these are harmful rays, in diagnostic radiology it is generally safe for the patients. Though you have undergone many investigations it is well below the maximum allowable safe dose for the patient. Amount of radiation delivered to the patient varies with the organ for which imaging is done like an x-ray of L/S (lumbosacral) spine causes maximum radiation during an x-ray. It depends on the voltage and milliampere used during taking x-rays. Please do not worry about radiation hazard; the total added dose is far below the maximum allowable dose. There is almost no chance of cancer due to radiation.