Predictive Value of CTA Spot Sign on Hematoma Expansion in Intracerebral Hemorrhage Patients

Figure 1

These images depict a left hemisphere ICH. A single sign with a spot-like appearance on CTA (orange arrow). The hyperdense area (blue arrow) in the first picture signifies an early hematoma in a baseline noncontrast CT. The second image shows that a spot sign (orange arrow) within the hematoma (green arrow) is discontinuous to any outside vessels and has a higher CT HU than the background hematoma in real CTA. The third image shows an expanding hematoma (blue arrow) in a 24 h follow-up noncontrast CT. Image provided by Dr. Andrew M. Demchuk, M.D., FRCPC.