New imaging combines light and sound to watch brain oxygen supply in real time

The brain is a black box of densely packed neurons, blood vessels and immune cells, all locked away in a sealed skull. WashU's Song Hu has dedicated his career to unlocking that puzzle box by developing new ways to "see" inside. His team's newest innovation could give researchers a new view of how brain cells and blood vessels work together and what happens when the coupling between the two breaks down.

Hu, a professor of biomedical engineering at Washington University in St. Louis, and his team at the McKelvey School of Engineering have developed a new way to integrate two powerful techniques: two-photon microscopy and photoacoustic microscopy (TPM-PAM). The system will allow researchers to see in real time how the brain’s vasculature delivers oxygen to neurons. The new system could have profound implications for studying neurodegenerative diseases, stroke and other diseases connected to neurovascular coupling.

“Using this technology gives us a better understanding of these disease mechanisms,” Hu said.

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