Fig. 1From: In vitro evaluation of cerebrospinal fluid velocity measurement in type I Chiari malformation: repeatability, reproducibility, and agreement using 2D phase contrast and 4D flow MRISummary of the average peak CSF velocities reported in 2D PC MRI (a) and 4D PC MRI (b) literature for healthy subjects and Chiari malformation patients pre-decompression surgery. Average values in figure are weighted by number of subjects within each study. Error bars represent pooled reported standard deviation for studies included in each group. The total number of healthy and Chiari malformation patient studies included is 91 and 166, respectively (see Table 1 for individual values). FM = foramen magnumBack to article page