Gradient Fields & Acoustic Noise Safety

Gradient coils are used to: Create static magnet. Produce spatial encoding. Cool the system. Reduce noise.

Gradient switching causes: Heat only. Loud knocking sounds. Radiation. Vibration only.

MRI noise levels can reach: Safe conversation levels. 60 dB. Very high decibel levels. Silent levels.

Hearing protection is required for: Staff only. Patients only. Anyone in the scan room during scanning. Visitors outside.

Earplugs help prevent: RF burns. Hearing damage. Image distortion. Heating.

Gradient fields can stimulate: Skin nerves and muscles. Bones. Blood flow. Organs.

Peripheral nerve stimulation may feel like: Tingling or twitching. Heat. Cold. Pain.

MRI systems are designed to: Ignore noise. Monitor nerve stimulation. Eliminate sound. Increase vibration.

Gradient noise is strongest during: Idle time. Fast imaging sequences. Setup only. Shutdown.

Hearing protection should be: Optional. Offered but not required. Mandatory. Used only for children.

Technologists can reduce noise by: Increasing gradients. Adjusting sequences. Ignoring settings. Removing ear protection.

Children may need: No protection. Extra hearing protection. Shorter scans only. Higher volume.

Gradient-related risks are: Imaginary. Controlled by system limits. Ignored. Severe.

Acoustic noise is a result of: RF energy. Mechanical vibration of gradients. Magnet cooling. Patient movement.

Noise safety is important to prevent: Fatigue. Hearing injury. Claustrophobia. Motion artifacts.