Which imaging modality creates cross-sectional images without ionizing radiation?

Which imaging modality creates cross-sectional images without ionizing radiation?

• A. Computed Tomography
• B. Nuclear Medicine
• C. Magnetic Resonance Imaging
• D. Ultrasound

Answer: (C)

Cross-sectional imaging without ionizing radiation is best achieved with magnetic resonance imaging. MRI uses a strong magnetic field and radiofrequency pulses to excite hydrogen protons and then reconstruct image data into slices that run through the body in multiple planes—axial, coronal, and sagittal. This gives detailed cross-sectional views with superb soft-tissue contrast, all without exposing the patient to ionizing radiation. Computed tomography relies on X-rays, which are ionizing. Nuclear medicine uses radiopharmaceuticals and also involves ionizing radiation. Ultrasound uses sound waves and is non-ionizing, and it can show slices, but MRI provides the most widely used, high-quality cross-sectional images across diverse body regions without radiation exposure.

Cross-sectional imaging without ionizing radiation is best achieved with magnetic resonance imaging. MRI uses a strong magnetic field and radiofrequency pulses to excite hydrogen protons and then reconstruct image data into slices that run through the body in multiple planes—axial, coronal, and sagittal. This gives detailed cross-sectional views with superb soft-tissue contrast, all without exposing the patient to ionizing radiation.

Computed tomography relies on X-rays, which are ionizing. Nuclear medicine uses radiopharmaceuticals and also involves ionizing radiation. Ultrasound uses sound waves and is non-ionizing, and it can show slices, but MRI provides the most widely used, high-quality cross-sectional images across diverse body regions without radiation exposure.