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(a) 3-dimensional view of the three (length and area) measurements. (b–d) 2-dimensional view of the three measurements. (a) Biparietal diameter (BPD): the length is computed in the coronal slice. (b) Transcerebellar diameter (TCD): the length is computed in the axial slice. (c) Deep grey matter area (DGA): the area is computed in the axial slice. See Section 3.2.2.
