Intra- and inter-observer variability of basal flow velocity and vascular reactivity measurements using transcranial Doppler sonography

Ceravolo et al. (1992) reported an observational. Transcranial Doppler sonography vs. Intra- and inter-observer comparisons was evaluated on Intra- and inter-observer variability of flow velocity values. Transcranial Doppler sonography flow velocity measurements were reproducible when repeated by the same examiner, but more variable when detected by different investigators during activation tests.