Aleph maps brain vessels through intact skull: the BCI gap
Aleph published a 3D vascular map of the living brain captured through an intact skull with ultrasound and microbubble contrast, but the promised brain-computer interface requires extracting a far weaker signal without any contrast agent, a step Aleph still needs to prove.
On June 24, Aleph published a 3D map of blood flow inside a living brain, captured through an intact skull using ultrasound. The company released the full processing code and dataset to reproduce the result.
The signal was amplified with microbubbles: tiny gas-filled shells injected into the bloodstream that return a far stronger ultrasound echo than red blood cells. The software estimates each bubble's center, tracks its motion, and reconstructs a 3D vascular map from millions of those points. The technique is called ultrasound localization microscopy. Aleph leads with a promise of telepathy. The actual result, so far, is a vascular map from a four-minute scan.
The planned brain-computer interface (BCI) must work without microbubbles. The task: extracting the weak signal of ordinary red blood cells from raw ultrasound data using machine learning. Neurons consume oxygen, blood vessels deliver blood, and changes in blood flow indirectly show which brain regions are active. Functional MRI uses the same relationship, but it is a large machine in a separate room. Aleph wants a similar activity map from a portable device.
Competitive context. Paradromics implants 421 microelectrodes directly into brain tissue to restore speech. Gestala raised $21.6 million for an ultrasound approach without surgery but is still promising a prototype. In 2023, MindEye decoded images a person had seen from fMRI data, still tied to a stationary scanner. In 2024, researchers demonstrated functional brain ultrasound in a living adult, but the signal passed through an acoustically transparent window in the skull after reconstructive surgery. Aleph is working through a normal skull.
On the hardware side, the company uses ultrasound chips from Butterfly under a licensing program (Butterfly Embedded) and plans to miniaturize the device into a portable format.
Aleph released the code and data; the result can be reproduced. The next step: proving that ultrasound through the skull carries enough information for a brain-computer interface.
MATTER (organization), page on Eternal Search.
Sources
alephneuro.com
github.com
t.me
t.me
businesswire.com
medarc-ai.github.io
Aleph's announcement is generating BCI headlines while the actual demo is contrast-enhanced vascular imaging, not neural signal reading; correcting that conflation is the editorial value, and the MATTER organization page on Eternal Search gives readers a concrete entry point into the healthtech support infrastructure where early neurotechnology companies like Aleph seek backing.