MRI is characterized by exposure to which of the following?

MRI is characterized by exposure to which of the following?

• A. Ionizing radiation from X-rays
• B. A magnetic field and radio wave transmission
• C. Sound waves
• D. Visible light exposure

Answer: (B)

MRI relies on a powerful static magnetic field to align hydrogen nuclei and radiofrequency pulses to disturb that alignment so the protons emit signals as they relax. The image is built from those signals, with additional gradient fields helping to locate where they come from. This energy interaction is non-ionizing, meaning MRI does not use ionizing radiation like X-rays. It also does not image with sound waves or visible light. So the defining exposure of MRI is a magnetic field combined with radio wave transmission.

MRI relies on a powerful static magnetic field to align hydrogen nuclei and radiofrequency pulses to disturb that alignment so the protons emit signals as they relax. The image is built from those signals, with additional gradient fields helping to locate where they come from. This energy interaction is non-ionizing, meaning MRI does not use ionizing radiation like X-rays. It also does not image with sound waves or visible light. So the defining exposure of MRI is a magnetic field combined with radio wave transmission.