A validation and focused ultrasound modulation study
https://www.sciencedirect.com › article › abs › pii
by MT Lin · 2026 — Nanobubbles, not microbubbles, enable ultrasound visualization of the perivascular space: A validation and focused ultrasound modulation study☆ · Abstract …Read more
https://dspace.mit.edu › bitstreams › download
by JF Hou · 2023 — Precise neurostimulation has potential to revolutionize therapies for neurologi- cal disorders. However, current neural interfaces targeting the deep brain face.Read more
The paper you linked is the standout recent study on this topic: “Nanobubbles, not microbubbles, enable ultrasound visualization of the perivascular space: A validation and focused ultrasound modulation study” by Meng-Ting Lin, Chueh-Hung Wu, et al. (including Wen-Shiang Chen), published in Ultrasonics (September 2026, DOI: 10.1016/j.ultras.2026.108074).
What the Lin et al. 2026 paper does
They used contrast-enhanced superb microvascular imaging (SMI) — an advanced ultrasound technique sensitive to slow flow and microvasculature — combined with nanobubbles (<450 nm) injected into the cisterna magna in rats.
This allowed real-time visualization and quantification of PVS/glymphatic flow dynamics (via vascularity index, VI) in deep brain structures. The signal was transient (peaked ~5 min post-injection, declined by 20 min).
Key finding on bubbles: Nanobubbles worked well because they are small enough to access PVS (overcoming size-exclusion barriers). Conventional microbubbles (>1 µm) did not produce signal enhancement when injected the same way.
They also applied focused ultrasound (FUS) stimulation after nanobubble injection, which robustly amplified the PVS signal/flow (significant VI increase post-FUS).
Overall: This provides a non-optical, accessible ultrasound platform to probe PVS dynamics and test FUS-mediated modulation of glymphatic transport. It bridges superficial optical methods and MRI.
Eryney (NYC 7/1-8/31) reposted
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