Brain scan offers hope to coma patients

PET imaging can help tell whether a brain-injured patient who appears to be in a vegetative state has a chance of regaining some consciousness, according to a new study.

In an unprecedented trial among comatose patients, Belgian researchers said the scanner, which is not routinely used for this purpose, could identify those who were unresponsive but showed consciousness.

And among the more severely injured patients, it could also tell which ones had the potential to recover a degree of consciousness, even

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