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. 2022 Feb 14;32(4):923–929. doi: 10.1007/s00062-022-01138-1

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© The Author(s) 2022

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Fig. 2 — Methods to measure midline shift (MLS) in the same patient. (1) The (A/2-B) method, where A is the width of the intracranial space and B is the distance from the tabula interna to the septum pellucidum at the foramen of Monro (MLS = 0.40 cm). (2) The (A/2-B) method where MLS is measured at the site of largest displacement (MLS = 0.66 cm). (3) The ideal midline A is determined as the line between the most anterior and posterior part of the falx cerebri. Line B is drawn perpendicular to line A to the septum pellucidum and is then calculated as shift (MLS = 0.80 cm)