Prognostic value of arterial spin-labeling perfusion in anoxic brain injury: A retrospective cohort study

Figure 1 Representative diffusion weighted imaging and arterial spin-labeling sequences illustrating region of interest selection for semiquantiative analysis of signal intensity. A region of interest (ROI) measuring approximately 30 mm² areas was selected for each of twelve brain regions (bilateral frontal, parietal, temporal, and occipital lobes; thalami; and basal ganglia). The raw mean and maximum signal intensity within each ROI was recorded and normalized on a 0-12 point scale using the signal intensity within the ipsilateral cerebellar hemisphere as an internal reference value. A: A representative example of an ROI within the right frontal lobe on a diffusion weighted imaging sequence; B: A representative example of an ROI within the right frontal lobe on the corresponding arterial spin-labeling sequence.