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Frontal-occipital horn ratio (FOHR) of 12 infants born very preterm on their initial routine cranial ultrasound, at time of diagnosis with intraventricular hemorrhage (IVH), and at diagnosis of post-hemorrhagic hydrocephalus (PHH) prompting surgical treatment of their hydrocephalus. At term equivalent age, all infants underwent diffusion MRI (dMRI), demonstrating a reduction in their median FOHR following treatment.
