Maximal variation of ASPECTS sections with baseline alteration. Maximal variation of ASPECTS sections with baseline alteration. The two ASPECTS sections with two different baselines: superior OML (solid line) and parallel two slices, and inferior OML (dashed line) and parallel two slices. The respective upper and lower slices are divided into thirds. Cuts are through the basal ganglia and roof of the lateral ventricle to show that disagreement is not more than 2 cm J. H. Warwick Pexman et al. AJNR Am J Neuroradiol 2001;22:1534-1542 ©2001 by American Society of Neuroradiology