For thirty minutes Swiss mice were exposed to a 60 G 12 Hz or a 460 Hz
pulsed magnetic field. The blood-brain flow was then calculated thank
s to an i.v. injection of Tc-99m HM-PAO, 0, 3 or 24 hours after the en
d of the exposure. In the end, it was in fact impossible to discrimina
te between the exposed mice and the controls.