Radiology Practice Test

What imaging technique utilizes magnetic fields and radio waves to visualize internal structures?

1. X-ray

2. CT Scan

3. MRI (Magnetic Resonance Imaging)

4. Fluoroscopy

The correct answer is: MRI (Magnetic Resonance Imaging)

The imaging technique that utilizes magnetic fields and radio waves to visualize internal structures is MRI (Magnetic Resonance Imaging). MRI is particularly valuable for examining soft tissues, such as those found in the brain, muscles, and organs, due to its ability to provide high-resolution images without the use of ionizing radiation. In MRI, the magnetic fields align the protons in the body, mainly those in hydrogen atoms, and radio waves are then used to disrupt this alignment temporarily. When the protons return to their original alignment, they emit signals that are captured and translated into detailed images of the internal structures. This method allows for a comprehensive view of both the anatomy and any pathological changes. Over other imaging techniques, MRI is non-invasive and does not expose patients to harmful radiation, making it a preferred option in many clinical situations where detailed imaging is required.