This study presents a novel method using Photoacoustic Computed Tomography (PACT) with a linear ultrasound (US) transducer array to observe visual-evoked hemodynamic responses in the deep mouse brain. By applying advanced data processing techniques, we successfully isolated hemodynamic responses within critical visual regions. The PACT system's high spatial resolution and deep tissue penetration enabled non-invasive examination of visual-evoked brain activity. Our findings demonstrate the potential of PACT for advancing optical neuroimaging and studying synaptic physiology, brain activities, and retinal diseases.
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