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Diameter-based measurement. Sagittal T2-weighted image in the same patients with in Fig. 1. The craniocaudal diameter (dcc) and anteroposterior diameter (dap) are shown. The lateral diameter (dl) is determined in the axial plane. Diameter-based tumor volume (V) is then computed with the ellipsoid formula (V = dcc × dl × dap × Π / 6).
