RF Heating & SAR Safety

RF energy in MRI is used to: Create sound. Generate images. Cool the patient. Power the magnet.

SAR stands for: Signal Absorption Rate. Specific Absorption Rate. System Adjustment Ratio. Scan Area Range.

High SAR levels can cause: Noise. Tissue heating. Image blur. Magnet shutdown.

SAR limits are set to protect: Equipment. Images. Patients. Staff only.

RF heating risk increases with: Short scan time. Larger patients. Certain sequences. All of the above.

Implants may increase RF heating due to: Color. Shape. Conductive materials. Size only.

MRI systems monitor SAR to: Improve contrast. Prevent overheating. Reduce noise. Shorten scans.

Patients should report: Cold feelings. Tingling or burning sensations. Hunger. Fatigue.

SAR limits vary based on: Patient weight. Scan type. Body part. All of the above.

Proper padding helps prevent: Noise. RF burns. Claustrophobia. Motion.

Contact between skin surfaces can: Reduce SAR. Increase burn risk. Improve comfort. Improve images.

RF burns are: Rare but preventable. Common. Harmless. Required.

MRI technologists reduce SAR by: Ignoring limits. Adjusting scan parameters. Increasing power. Speeding scans.

SAR monitoring is: Optional. Automatic on MRI systems. Manual. Rarely used.

RF safety is important because: MRI uses electricity. Heating can injure patients. Images depend on it. Scans are long.