New studies by radiologists have shown that MRI can be just as accurate as CT scans at helping radiologists diagnose pathologies such as cancer, cysts and kidney stones -- while carrying less risk, especially for pregnant women. The magnetic waves and radio frequency energy used in MRI are a safer alternative to the potentially carcinogenic X-rays of CT scans, especially during gestation. CT scans are still much faster, but medical physicists are working on developing faster MRI machines.
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