“…It not only allows the evaluation of research performance, but also helps investigators refine their research blueprint based on the research trends and overall landscape of the research field (Brinjikji et al, 2013; Yeung et al, 2017a). There are already numerous reports that identified the 100 most cited articles, also known as citation classics, in various fields such as imaging (Brinjikji et al, 2013), radiology (Yoon et al, 2013; Pagni et al, 2014), neuroimaging (Kim et al, 2016), neurosurgery (Ponce and Lozano, 2010), and neurosciences (Yeung et al, 2017a). Analyses based on citation counts are primarily supported by an earlier notion that citation counts could be correlated to peer judgments (Bayer and Folger, 1966; Garfield, 1970), which are in turn commonly accepted as a way to rank scientific performance (Garfield, 1979).…”