The terminology can also be confusing.
"One way of measuring is through rem,” said Dr. John Soh, chief of radiation oncology at the Cleveland Clinic. “Another way is the sievert. And because the seivert is a very large unit, we typically measure things in milliseverts. And just to give you an idea, a chest x-ray is about 0.2 milliseiverts," Soh stated.
Dr. Soh says the average person should not be exposed to more than one milliseivert per year. If a person were exposed to 17 seiverts or 1,700 rem, it would likely result in a fatal cancer.
福岛阴云:中国境内核辐射究竟多恐怖