Text and Data Mining valid from 2019-08-14
Received: 2 April 2019
Accepted: 23 June 2019
First Online: 14 August 2019
Ethics approval and consent to participate
: According to the guidelines of the local ethics committees, ethic approval was given for the retrospective evaluation of patient data, which was conducted in accordance to the Declaration of Helsinki.
: Not applicable
: The department of neuroradiology of university clinic Goettingen has a research agreement with Siemens healthcare GmbH, Forchheim, Germany.