Self-powered sensor enhances MRI efficiency

During an MRI scan, even slight movements can cause "motion artifacts," blurring the final images and necessitating a repeat scan. Traditional methods to track and mitigate patient movement involve embedding sensors into the MRI table. However, magnetic materials typically used in sensors interfere with MRI technology. This issue has led researchers to seek alternative solutions.

Triboelectric nanogenerators (TENGs) offer a promising solution. These devices generate power through static electricity created by friction between polymers, eliminating the need for metal or magnetic components. Li Tao, Zhiyi Wu, and their colleagues developed a TENG-based sensor specifically designed to operate within the MRI environment without causing interference.

The TENG sensor comprises two layers of plastic film coated with graphite-based conductive ink and a central layer of silicone. When these layers are pressed together, electrostatic charges transfer from the plastic film to the conductive ink, generating a current that is then transmitted through a wire.

The sensor was integrated into an MRI table positioned under a patient’s head. During tests, the sensor successfully detected head movements, triggering an audible alert and a pop-up notification on the technician’s computer, which then halted the MRI scan. This real-time response helps prevent motion artifacts, ensuring clearer images and reducing the need for repeat scans.

This TENG-based sensor has the potential to significantly improve the efficiency of MRI scans. By promptly detecting patient movement and pausing the scan, it minimizes the likelihood of motion artifacts and the frustration associated with repeat scans. "This work could help make MRI scans more efficient and less frustrating for patients and technicians alike," the researchers noted.

The American Chemical Society (ACS), which published these findings, is a nonprofit organization dedicated to advancing the chemistry enterprise and its practitioners for the benefit of Earth and its people. ACS promotes excellence in science education and provides access to chemistry-related information and research through its various research solutions, peer-reviewed journals, and scientific conferences. While ACS itself does not conduct chemical research, it supports global scientific advancements through its CAS division, which collaborates with innovators worldwide.

MEDICA-tradefair.com; Source: American Chemical Society (ACS)