The remainder of the bone marrow does not enhance in keeping with the presence of hematopoietic marrow, fibrosis, or both.
Plasma, the liquid portion, is mostly water, and thus has relatively long T1 and T2 values.
This technique has some advantages of both T1 and T2-weighted sequences and is commonly used in musculoskeletal imaging.
Iron atoms are released, but coalesce by the thousands into large, chunky metallo-protein complexes known as ferritin and hemosiderin.