This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).
This article has been retracted at the request of the authors.
The authors realized after publication that their study results could confuse readers because of the CTA method used. They would prefer to do further research using a time-resolved and local CTA to identify feeding arteries and AVF in a further study in order to determine whether TWIST could be comparable to CTA.