Higher contrast ct scans can be as much as 700 x-rays. Medics are violating patients informed consent again - oops. https://nwhn.org/getting-burned-radiation-exposure-ct-scans " The cancer-causing effects of CT scans are not well-known, even among physicians who regularly order or interpret these scans. One study interviewed patients who came to an Emergency Department (ED) with abdominal or flank pain and who had received a diagnostic CT scan. The patients were asked if the risks and benefits of CT scans had been explained to them, if radiation doses had been mentioned, and if they believed that CT scans increased the lifetime risk of cancer.(8: Lee) Participants were then asked to estimate a CT scan’s radiation dose, compared to a chest X-ray. ED doctors (who routinely order diagnostic CT scans) and radiologists (who interpret the scans) were also asked variations on these questions. Only 3% of patients and 9% of ED docs knew that CT scans increased the lifetime risk of cancer; amazingly, only 47% of radiologists surveyed answered the cancer risk question correctly. On estimates of radiation doses from CT scans vs. chest X-ray, most believed that CT scans provided 2--10 times the radiation dose of a chest X-ray (64% of patients, 44% of ED docs, and 56% of radiologists chose this answer from five options) . In truth, CT scans provide a radiation dose 100--250 times higher than a chest X-ray. Only 22% of the ED docs and 13% of radiologists got it right (none of the patients guessed that high). Understandably, patients were not informed of risks unknown to their doctors: 78% of the ED docs stated that they had not outlined risks and benefits of CT scan radiation to patients. Almost all (93%) of patients reported that CT scans’ risks and benefits had not been outlined to them.(8: lee) Ironically, patients are routinely asked to sign a consent form that tells them about rare but serious complications and deaths (1 in 400,000) caused by the iodinated contrast material often injected during CT scans. The forms usually do not mention cancer risk, which is probably far more common (although it may occur many years later).(9: Martin) "