Which imaging modality is abbreviated MR and uses a strong magnetic field to generate images?

Which imaging modality is abbreviated MR and uses a strong magnetic field to generate images?

• A. Ultrasound
• B. X-ray
• C. Computed Tomography
• D. Magnetic Resonance Imaging

Answer: (D)

MR stands for Magnetic Resonance Imaging. This modality uses a very strong magnetic field, along with radiofrequency pulses, to align hydrogen protons in the body's tissues. When the protons relax back to alignment, they emit signals captured by coils and processed into detailed images, especially of soft tissues. The other choices are based on different physical principles: ultrasound relies on sound waves; X-ray and CT use ionizing radiation from photons. Because MR relies on magnetism rather than radiation to create images, Magnetic Resonance Imaging is the correct description.

MR stands for Magnetic Resonance Imaging. This modality uses a very strong magnetic field, along with radiofrequency pulses, to align hydrogen protons in the body's tissues. When the protons relax back to alignment, they emit signals captured by coils and processed into detailed images, especially of soft tissues. The other choices are based on different physical principles: ultrasound relies on sound waves; X-ray and CT use ionizing radiation from photons. Because MR relies on magnetism rather than radiation to create images, Magnetic Resonance Imaging is the correct description.