Fig. 1.

Example showing ten of the 26 anatomical ROIs in an SLE patient, placed in the nuclei caudatus, putamina, posterior thalami, anterior and posterior insulae. The color-coded CBF image (B) was used to avoid pixels with high blood flow, indicating intravascular space. Relative perfusion-based parameters were extracted from the CBF (A), CBV (C) and MTT (D) maps. ROI = region of interest, SLE = systemic lupus erythematosus, CBF = cerebral blood flow, CBV = cerebral blood volume, MTT = mean transit time.