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Artifacts and diagnostic pitfalls on magnetic resonance imaging: a clinical review
F J Hahn1, W K Chu, P E Coleman
1Department of Radiology, University of Nebraska School of Medicine, Omaha.
Abstract:
High field MRI of the brain occasionally exhibits imaging artifacts; most artifacts are obvious and easily recognized, but some are subtle and mimic disease. A thorough understanding of brain MRI artifacts is important to avoid potential diagnostic pitfalls. Some imaging techniques or procedures could be utilized to remove or identify artifacts. These include additional projections, different pulse sequence, and 90 degree shift of phase-encoding gradient. The use of respiratory gating or cardiac gating may also improve image quality by reducing some of the motion-related artifacts.
Insights
Understanding brain MRI artifacts is crucial for accurate diagnosis. Subtle artifacts can mimic disease, but techniques like adjusted pulse sequences and gating can help identify and reduce them.
Area of Science:
- Medical Imaging
- Radiology
- Neuroimaging
Background:
- High-field Magnetic Resonance Imaging (MRI) is essential for brain imaging.
- MRI scans can be affected by various imaging artifacts.
- Some artifacts are subtle and can be mistaken for pathological conditions.
Observation:
- Artifacts in brain MRI can be challenging to differentiate from actual disease.
- A deep understanding of artifact formation is necessary for accurate interpretation.
- Specific imaging techniques can aid in artifact identification and mitigation.
Findings:
- Additional projections, modified pulse sequences, and phase-encoding gradient shifts can help resolve artifacts.
- Techniques such as respiratory gating and cardiac gating can reduce motion-related artifacts.
- Implementing these strategies improves the reliability of brain MRI interpretation.
Implications:
- Accurate identification of MRI artifacts prevents misdiagnosis and unnecessary patient anxiety.
- Improved image quality enhances diagnostic confidence in neurological assessments.
- Knowledge of artifact management is vital for radiologists and clinicians utilizing advanced neuroimaging.