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Rats were exposed to 27.1 MHz RF (PW - 65 msec pulse width, 400 pps) for 2 hours at an SAR of (?) during middle cerebral artery occlusion (MCAo). Ischemia produced by MCAo resulted in a 300% rise in calcium tissue dry weight content at 24 hours in infarcted tissue. RF exposure had no additional effect, while positive control (spinal cord contusion) did. RF exposure did, however, produce regional reductions in water content in different regions of the brain in some of the exposed animals, although the effect was not consistent. |