What is the recommended practice when imaging a patient with a known metal restoration to reduce streaks?

What is the recommended practice when imaging a patient with a known metal restoration to reduce streaks?

• A. Use a large focal spot and maximize exposure to reduce streaks
• B. Use a small focal spot, adjust exposure, and consider alternate views or CBCT if artifacts obscure critical anatomy
• C. Skip imaging and rely on clinical examination
• D. Ferromagnetic shielding around the restoration

Answer: (B)

Metal restorations create streaks because high-contrast interfaces interact with the X-ray beam, causing beam hardening and scatter. The best way to mitigate this is to optimize technique and views. Use a small focal spot to improve sharpness near the restoration, and adjust exposure to lessen artifact visibility—often by increasing the beam energy (higher kVp) and balancing mA so the image remains adequately exposed. If the artifacts still obscure critical anatomy, obtain alternate views or use CBCT to evaluate the area from different angles or with artifact-reduction capabilities. This approach avoids worsening blur with a large focal spot, doesn’t rely on skipping imaging, and doesn’t involve shielding, which aren’t effective for reducing these artifacts.

Metal restorations create streaks because high-contrast interfaces interact with the X-ray beam, causing beam hardening and scatter. The best way to mitigate this is to optimize technique and views.

Use a small focal spot to improve sharpness near the restoration, and adjust exposure to lessen artifact visibility—often by increasing the beam energy (higher kVp) and balancing mA so the image remains adequately exposed. If the artifacts still obscure critical anatomy, obtain alternate views or use CBCT to evaluate the area from different angles or with artifact-reduction capabilities.

This approach avoids worsening blur with a large focal spot, doesn’t rely on skipping imaging, and doesn’t involve shielding, which aren’t effective for reducing these artifacts.