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Artifacts in mri

The chemical shift artifact is commonly noticed in the spine at the vertebral body end plates, in the abdomen, and in the orbits where fat and other tissues form borders. In the frequency direction, the MRI scanner uses the frequency of the signal to indicate spatial position. Since water in org

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Artifacts in mri

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    1. Artifacts in mri By Samar Ali Shigairi MD Sattam S. Lingawi, MD, FRCRP, ABR

    2. The chemical shift artifact is commonly noticed in the spine at the vertebral body end plates, in the abdomen, and in the orbits where fat and other tissues form borders. In the frequency direction, the MRI scanner uses the frequency of the signal to indicate spatial position. Since water in organs and muscle resonate at a different frequency than fat, the MRI scanner mistakes the frequency difference as a spatial (positional) difference. As a result, fat containing structures are shifted in the frequency direction from their true positions.

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