How much asymmetry should be considered normal variation or within normal range in asymmetrical frontal horns of the lateral ventricles noted during CT brains scans without evidence of midline shift or any other significant lesion?

Cha S, George AE. How much asymmetry should be considered normal variation or within normal range in asymmetrical frontal horns of the lateral ventricles noted during CT brains scans without evidence of midline shift or any other significant lesion? AJR Am J Roentgenol. 2002 Jan; 178(1):240.