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Topic1 brief · in the index since September 25, 2026

Positron emission tomography

Imaging technique measuring metabolic activity in tissues.

Every brief in the library that is about Positron emission tomography or leans on it for its answer, newest first. Each was written because somebody asked, and each cites its sources.

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Science

We use far more than 10% of our brains

Brain scans show activity across virtually every region over a normal day, and damage almost anywhere causes measurable loss.

False2 min read4 sources

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