1 Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and research, Amager and Hvidovre Hospital, The Capital Region of Denmark2 unknown3 Klinik for Klinisk Fysiologi, Nuklearmedicin og PET, Diagnostisk Center, Rigshospitalet, The Capital Region of Denmark
A preliminary investigation of the effects of stimulation of the visual and the motor cortex was made on a conventional 1.5 T MR imaging scanner. Both types of activation gave a detectable change in the signal between rest and stimulation using a gradient echo sequence with an echo time of 60 ms. The observed effects were assumed to be caused by variation in the amount of paramagnetic deoxyhemoglobin between stimulation and rest due to local increase of capillary blood flow in the human brain during stimulation.
Acta Radiologica, 1993, Vol 34, Issue 1, p. 101-103