Figure 3From: Measurement precision and biological variation of cranial arteries using automated analysis of 3 T magnetic resonance angiographyIntra- and inter-observer variations in the middle meningeal (MMA) and middle cerebral (MCA) arteries. Mean arterial circumferences (mm) are shown for the first (dark columns) and second (white columns) analyses done by observer A (OA) and observer B (OB). Bars represent the standard deviations.Back to article page