Magnetic Resonance Imaging for Stage IV Melanoma During Pregnancy—Reply

In the United Kingdom, the National Radiological Protection Board (NRPB), now the Radiation Protection Division of the Health Protection Agency, suggests that pregnant women should not be offered MRI in the first 3 months of pregnancy. These, in turn, can cause adverse effects that may be avoidable if the temperatures in the tissues do not exceed 38°C. On this basis, the NRPB concluded that until further information becomes available, pregnant women should not undergo MRI in the first 3 months of pregnancy unless the only reasonable alternative imaging method involves the use of x-ray procedures.