Leeds, United Kingdom – A tiny magnetic robot that can take 3D scans from deep within the body has been developed by researchers, potentially transforming early cancer detection.

The team from the University of Leeds has created a device that generates high-resolution 3D ultrasound images from inside the gut, a first in medical technology.

This innovation allows “virtual biopsies,” providing instant diagnostic data and enabling doctors to detect and treat cancer in one procedure, without traditional biopsies.

The robot’s success comes from its unique oloid shape, which gives it a rolling motion for precise navigation and imaging inside the body.

Published on March 26 in Science Robotics, the study details how the oloid shape was integrated into a new magnetic flexible endoscope with a high-frequency imaging device.

The technology emerged from a collaboration between the University of Leeds, University of Glasgow, and University of Edinburgh, combining robotics and ultrasound expertise.

Professor Pietro Valdastri from Leeds said this is the first time a 3D ultrasound image has been reconstructed from deep inside the gut, speeding up colorectal cancer diagnosis.

The 28 MHz micro-ultrasound array offers detailed 3D images, mimicking traditional biopsy results without invasive sampling.

Unlike standard ultrasound, this high-resolution probe reveals microscopic tissue details, advancing scans deeper into the gastrointestinal tract.

Lead author Nikita Greenidge from Leeds’ STORM Lab said this could improve early colorectal cancer diagnosis, reducing patient wait times and discomfort.

Funded by multiple research councils, the 21mm robot was tested in artificial colons and pigs, proving its ability to navigate and scan accurately.

Human trials could begin in 2026, building on existing robotic colonoscopy platforms already in development at Leeds.

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