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Cerebral vessels. Left panel. Magnification angiography of normal rat brain using barium sulphate contrast medium. There is an abundant vascular supply with many penetrating microvessels in the cortex shown in the right panel following intra-arterial injection of India ink (black regions of a haemotoxylin and eosin stains section). Scale bar = 5 mm for the left panel and 50 µm for the right panel. Modified from Hekmatpanah Surg Neurol 2007;67:564-71
