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Updated: Aug 21, 2026
Non-invasive Parenchymal, Vascular and Metabolic High-frequency Ultrasound and Photoacoustic Rat Deep Brain Imaging
Published on: March 2, 2015
Mapping blood vessels and oxygenation throughout the whole mouse brain with dual-frequency fiber-array photoacoustic
Gen Mu1, Yanyu Zhao2
1Beijing Advanced Innovation Center for Biomedical Engineering, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Engineering Medicine, Beihang University, 100191, Beijing, China.
Abstract:
A new all‑optical photoacoustic tomography system captures both low‑ and high‑frequency photoacoustic signals using an arc‑shaped fiber array. The high‑frequency channel resolves cortical vessels as fine as 70 μm near the surface; the low‑frequency channel reaches 1.2 cm to image the entire mouse brain. With ultrahigh sensitivity and blood oxygen saturation mapping, this dual‑frequency design alleviates the classic trade‑off between resolution and penetration-offering high‑resolution surface imaging and deep, wide‑field coverage within a single imaging platform.
