You mentioned that, MRIs are almost always preferable to CTs for imaging the head, and usually for the spine, except during trauma or when MRIs are not practical – such as when there are metal clips on the head. Why is the MRI not practical when there are metal clips in the head? Kindly explain.
Dr. Greene’s Answer:
The MRI is a very strong magnet — you would not want it to move around metal clips in the head, or anywhere else in the body!
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