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3-D Transcranial Ultrasound Localization Microscopy Reveals Major Arteries in the Sheep Brain
Summary
This study explored 3-D ultrasound localization microscopy (ULM) for imaging brain blood vessels through the skull. Results show 3-D ULM can visualize cerebral vasculature, offering potential for portable stroke detection.
Area of Science:
- Medical Imaging
- Biomedical Engineering
- Neuroscience
Background:
- Cerebral circulation is vital; stroke causes irreversible damage.
- Current imaging (MRI, CT) is inaccessible.
- Portable, non-ionizing ultrasound imaging is needed.
Purpose of the Study:
- Assess 3-D ultrasound localization microscopy (ULM) feasibility for transcranial imaging.
- Evaluate 3-D ULM in sheep brains, mimicking human skull properties.
Main Methods:
- 3-D ULM with a multiplexed probe was used on three sheep.
- Imaging was compared to angiographic MRI.
- Skull properties were characterized using MRI and micro-CT.
Main Results:
- 3-D ULM successfully highlighted cerebral vessels, including the circle of Willis.
- Imaging was limited by a constrained 3-D field of view.
- Sheep skull characteristics were successfully emulated.
Conclusions:
- 3-D ULM shows promise for transcranial vessel imaging.
- Further development is needed for signal, aberration correction, and human trials.
- Potential for a portable, volumetric, transcranial ultrasound angiography system exists.
