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MR imaging in patients with metallic implants.

R W Laakman, B Kaufman, J S Han

|December 1, 1985

Summary

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Magnetic resonance (MR) imaging is generally safe for patients with most metallic implants, causing minimal artifact and no significant adverse effects. Careful patient selection and understanding artifact factors are key for successful MR examinations.

Area of Science:

Radiology
Medical Imaging
Biomedical Engineering

Background:

Metallic implants are common in patients requiring medical imaging.
Magnetic resonance (MR) imaging poses potential risks due to artifact and interaction with metallic objects.

Purpose of the Study:

To evaluate the safety and image quality of MR examinations in patients with metallic implants.
To assess the incidence and impact of metallic artifacts on MR image interpretation.

Main Methods:

Conducted 305 MR examinations in 236 patients with various metallic implants (excluding pacemakers, etc.).
Analyzed images for metallic artifact presence and severity.
Reviewed patient records for adverse effects during MR examinations.

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Main Results:

Metallic artifacts were observed but rarely interfered with image interpretation.
Implant composition, mass, orientation, and position influenced artifact conspicuity.
Only two patients reported possible discomfort, with symptoms unlikely related to the MR process.

Conclusions:

MR imaging is feasible and safe for most patients with metallic implants at 0.3 T.
Metallic artifacts typically do not preclude diagnostic image quality.
No significant short-term adverse effects were observed in patients undergoing MR with metallic implants.