Fig. 1From: Cerebral ventriculomegaly in myotonic dystrophy type 1: normal pressure hydrocephalus-like appearances on magnetic resonance imaging A z-Evans Index and Callosal angle. A The figures are the MPR reconstructions of 3D FLAIR images. The z-Evans Index is defined as the maximum length (yellow lines) from the foramen of Monro to the superior margin of the frontal horns (dashed lines) on coronal FLAIR images / the maximum cranial z-axial length (red lines) on sagittal FLAIR images. The blue line indicates the anterior and posterior commissure (AC- PC) line. B Callosal angleBack to article page