Foci of low signal intensity

What does "Foci of low signal intensity" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.

Explanation

"Foci of low signal intensity" refers to small areas that appear darker than the surrounding tissue on a medical imaging scan. This could be due to various reasons, such as the presence of different types of tissue or changes in the tissue. The term does not specify what is causing these darker areas, only that they are present.

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