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Fig. 1 | Neurovascular Imaging

Fig. 1

From: Swirls and spots: relationship between qualitative and quantitative hematoma heterogeneity, hematoma expansion, and the spot sign

Fig. 1

a NCCT of deep right ICH (38 ml) with swirl sign (arrow). b Corresponding hematoma CT densitometry histogram (Mean HU 55.3, SD 9.7, CV 0.18, Skewness −0.26, Kurtosis 2.41). c CTA with multiple spot signs present (arrows). The patient subsequently underwent hematoma expansion of 41 ml. d NCCT of a different patient with right frontal lobar ICH (38 ml) and trace IVH. e Corresponding hematoma CT densitometry histogram (Mean HU 61.5, SD 12.2, CV 0.20, Skewness −0.64, Kurtosis 2.6). f CTA demonstrates no evidence of spot sign. The patient had a stable hematoma on 24-hour follow-up

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