| Callosal angle (blue <font color="DodgerBlue">'''V'''</font>) || Acute angle || Obtuse angle is typical of brain atrophy
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| Cause Most likely cause of leucoaraiosis (periventricular signal alterations, blue arrows [[File:Flecha tesela.svg|25px]]) || May well represent transependymal CSF Transependymal cerebrospinal fluid diapedesis due to NPH| Probably due to vascular Vascular encephalopathy, in this case suggested by unilateral occurrence
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