title: Reply.
authors.affiliation: Department of Radiology University of Minnesota Medical Center Minneapolis, Minnesota.
authors.forename: J C
authors.initials: JC
authors.lastname: Benson
authors.affiliation: Department of Radiology University of California San Francisco San Francisco, California.
authors.forename: S
authors.initials: S
authors.lastname: Payabvash
authors.affiliation: Department of Radiology Hennepin County Medical Center Minneapolis, Minnesota.
authors.forename: B
authors.initials: B
authors.lastname: Hoffman
authors.affiliation: Department of Radiology Hennepin County Medical Center Minneapolis, Minnesota.
authors.forename: M
authors.initials: M
authors.lastname: Oswood
authors.affiliation: Department of Radiology University of Minnesota Medical Center Minneapolis, Minnesota.
authors.forename: A M
authors.initials: AM
authors.lastname: McKinney