Smart Tattoo Technology for Early Melanoma Detection

Researchers from the Institut national de la recherche scientifique (INRS) and the University of Montreal have developed a temporary smart tattoo designed to detect melanoma at a stage where it is invisible to the naked eye. The technology, known as SMEAR-ULM, has been validated through preclinical studies as a minimally invasive method for early skin cancer detection.

The system is designed to identify micromelanomas that are typically too small to be spotted during a standard clinical visual examination or detected via traditional imaging techniques.

The Mechanism of SMEAR-ULM

The SMEAR-ULM technology functions as a microscopic thermometer embedded beneath the skin. The process begins with the use of micro-needles to painlessly deposit nanoparticles under the skin’s surface.

Once these nanoparticles are in place, they respond to exposure to near-infrared light by emitting visible light. The duration of this light emission is directly dependent on the local temperature of the surrounding tissue.

This temperature-sensitive reaction allows the researchers to identify cancerous anomalies. Because cancer cells consume oxygen and nutrients at a higher rate than healthy cells, they produce more heat, which the nanoparticles then signal optically.

Early Detection Capabilities

In preclinical trials, the research team successfully used the system to detect micromelanomas that were only four days old. At this extremely early stage, such tumors are generally too small to be identified by conventional diagnostic tools.

Jinyang Liang, the lead author of the study and a specialist in biophotonics and ultrafast imaging, noted the necessity of this precision in detection.

Because of their size, these tumors often escape clinical visual examination and fly under the radar. We want to be able to spot them as early as possible in order to intervene quickly

Jinyang Liang

The goal of the development is to provide a tool capable of identifying very small but aggressive melanomas, facilitating rapid medical intervention before the cancer can progress or spread.