Peter Freitag

Atrophy is detectable within a 3-month period in untreated patients with active relapsing remitting multiple sclerosis.

Ludwig Kappos, Stefan Wagenpfeil, Martin Hardmeier, 2003, Archives of neurology.

Image registration and subtraction to detect active T2 lesions in MS: an interobserver study

Massimo Filippi, Frederik Barkhof, Franz Fazekas, 2002, Journal of Neurology.

Improved interobserver agreement for visual detection of active T2 lesions on serial MR scans in multiple sclerosis using image registration

Massimo Filippi, Frederik Barkhof, Franz Fazekas, 2001, Journal of Neurology.