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Figure 3: MRA of neck vessels (a) normal both CCA; (b) decrease in right ICA caliber (red arrow); (c and d) thin stream of flow eccentrically: 'Crescent' sign in right ICA (red arrow); and (e and f) nonvisualization of right ICA

Figure 3: MRA of neck vessels (a) normal both CCA; (b) decrease in right ICA caliber (red arrow); (c and d) thin stream of flow eccentrically: 'Crescent' sign in right ICA (red arrow); and (e and f) nonvisualization of right ICA