5 Key Takeaways

• 1

  A new optical brain-monitoring method enhances signal quality by 20-fold, advancing noninvasive cerebral blood flow measurements.

• 2

  Interferometric diffusing wave spectroscopy (iDWS) tracks blood cell movement by analyzing fluctuations in scattered laser light.

• 3

  The refined system achieves reliable detection of blood flow at source–detector separations of up to 4–4.5 cm in adults.

• 4

  Using a low-cost CMOS sensor, the method significantly reduces hardware costs, making it more accessible for clinical use.

• 5

  Initial tests in a neuro ICU show real-time blood flow monitoring, indicating iDWS's potential for diagnosing stroke and brain injuries.