Erratum to: Abdom Imaging (2006) 31:568–574 DOI 10.1007/s00261-005-0194-y

This article was inadvertently published a second time under DOI:10.1007/s00261-006-9116-x.

Official publication is under DOI: 10.1007/s00261-005-0194-y appearing in Abdom Imaging (2006) 31:568–574.