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    A, CT scan of a patient with acute right exophthalmos resulting from a spontaneous orbital hemorrhage. The hematoma exhibits discrete margins, homogeneous consistency, and a radiodensity similar to that of blood vessels and muscle. B, T1 MR scan obtained 4 days after the hemorrhage demonstrates the transient bull’s-eye pattern characteristic of a hematoma beginning to undergo physical changes and biochemical hemoglobin degradation. C, T2 MR scan obtained the same day as the T1 study shows a characteristic ring pattern. D, T1 MR scan performed 3 months later shows that the hematoma has decreased in size. There is layering of the degraded blood components.