Classification of sedative agents based on their effects on the blood oxygenation level assessed by MRI at 17.2 T.

<p>A: The relative oxygenation ratio of isoflurane, sevoflurane, propofol, midazolam, medetomidine and ketamine-xylazine is displayed using a colored disk with variable intensity. Lower color saturation intensity corresponds to lower CBO level, and vice a versa. B: Proposed algorithm to identify anesthetic agents based on relative CBO in the cortex and thalamus as assessed by T2*-oxygenation-ratio. Low signal, T2*-oxygenation-ratio<50000; High signal, T2*-oxygenation-ratio>50000.