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  "path": "/news/2026-03-brain-fast-invasive.html",
  "publishedAt": "2026-03-31T15:40:03.000Z",
  "site": "https://medicalxpress.com",
  "textContent": "Sleep helps the brain to cleanse itself—and now this process can be measured in humans entirely noninvasively. Researchers at the University of Oulu have developed a method that allows the increased movement of brain fluids during sleep to be tracked quickly and safely, without the need for injected contrast agents.",
  "title": "Sleep cleans the brain: Researchers develop fast, non-invasive way to measure the process"
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