Biomedical engineers at the University of California, Davis, have developed a new technique for measuring blood flow in the human brain, which could be used in patients with stroke or traumatic brain injury, for example.

The new technique, based on conventional digital camera technology, could be significantly cheaper and more robust than prior methods.

The work is described in a paper published April 26 in the journal Optica.

"Our setup is very promising, and the cost should be lower," said Wenjun Zhou, a postdoctoral researcher working with Vivek Srinivasan, associate professor at the UC Davis Department of Biomedical Engineering.

If you shine a light into a cloudy solution, light particles, or photons, will be scattered in different directions.

Laser light is shined on the head; as photons from the laser pass through the skull and brain, they are scattered by blood and tissue.

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