title: Letter To The Editor.
authors.affiliation: Department of Radiology, University of Bonn, Sigmund-Freud-Strasse 25, Bonn 53105, Germany.
authors.forename: Claus Christian
authors.initials: CC
authors.lastname: Pieper
authors.affiliation: Department of Radiology, University of Bonn, Sigmund-Freud-Strasse 25, Bonn 53105, Germany.
authors.forename: Carsten
authors.initials: C
authors.lastname: Meyer
authors.affiliation: Department of Radiology, University of Bonn, Sigmund-Freud-Strasse 25, Bonn 53105, Germany.
authors.forename: Kai E
authors.initials: KE
authors.lastname: Wilhelm
authors.affiliation: Department of Radiology, University of Bonn, Sigmund-Freud-Strasse 25, Bonn 53105, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Block
authors.affiliation: Institute for Medical Biometry, Informatics and Epidemiology, University of Bonn, Sigmund-Freud-Strasse 25, Bonn 53105, Germany.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Nadal
authors.affiliation: Department of Nuclear Medicine, University of Bonn, Sigmund-Freud-Strasse 25, Bonn 53105, Germany.
authors.forename: Hojjat
authors.initials: H
authors.lastname: Ahmadzadehfar
authors.affiliation: Department of Radiology, University of Bonn, Sigmund-Freud-Strasse 25, Bonn 53105, Germany.
authors.forename: Winfried Albert
authors.initials: WA
authors.lastname: Willinek
authors.affiliation: Department of Radiology, University of Bonn, Sigmund-Freud-Strasse 25, Bonn 53105, Germany.
authors.forename: Hans Heinz
authors.initials: HH
authors.lastname: Schild