Dear Thomas,
what kind of stimulation did you use? Maybe your stimulation device
produces more electrical noise to the scanner in the active condition
than in the rest condition, increasing the mean intensity values.
Than global normalisation by scaling will produce this effect.
Michael.
--
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Dr. Michael Erb
Sektion f. experimentelle Kernspinresonanz des ZNS
Abteilung Neuroradiologie
Universitaetsklinikum
Hoppe-Seyler_Str. 3, D-72076 Tuebingen
Tel.: +49(0)7071/2985398 priv. +49(0)7071/61559
Fax.: +49(0)7071/294371
e-mail: <[log in to unmask]>
www: http://www.medizin.uni-tuebingen.de/nrad/sektion
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