Near-infrared spectroscopy (NIRS), an optical tool that leverages light-tissue interaction to measure changes in hemoglobin concentration and oxygenation, has been used in a variety of fields due to ...

In October 2024, Prof. Xiaozhen Li from Northwestern Polytechnical University reported the recent advancement in conjugated small molecular nanoparticles (CSMNs) for near-infrared phototheranostics ...

Photoplethysmography (PPG) is an optical sensing technique that measures blood volume changes and underpins devices ranging from hospital-grade pulse oximeters to consumer wearables that track heart ...

A team of scientists from Harvard Medical School and Duke University has created a new kind of tissue that can change heart activity using only light—no wires, no surgery, no harm. This groundbreaking ...