Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) CONDON BR,A quantitative index of ventricular and extraventricular intracranial CSF volumes using MR imaging,J Comput Assist Tomogr,,,1986,10,,784-792,https://cir.nii.ac.jp/crid/1573950400417983872,https://doi.org/10.1097/00004728-198609000-00015