Researchers Extended MAXWELL Microscopy Depth
The upgraded imaging technique now reaches 800 μm in mouse brain vasculature by utilizing near-infrared fluorescence.
Updated on Sept. 19, 2026 in Physics
Researchers have successfully extended MAXWELL microscopy to detect near-infrared fluorescence, allowing for imaging depths of 800 μm in mouse brain vasculature. This research-stage development achieves approximately 2.7 times the penetration depth of traditional visible light detection.
Why it matters
Traditional light-sheet microscopy is limited by optical scattering and absorption in biological tissue. This advance enables deeper, clearer observation of internal structures that previously remained obscured by standard imaging methods.
The study demonstrated an imaging depth of 800 μm using near-infrared light compared to 300 μm with visible light detection, a 2.7-fold increase. Measurements revealed that while near-infrared signals attenuated more steeply with depth, they showed less lateral signal broadening.
The details
MAXWELL, which stands for Microscopy by Achromatic X-rays With Emission of Laminar Light, uses X-rays as a deeply penetrating excitation source to bypass surface limitations. By screening Er3+/Yb3+-codoped rare-earth ceramic phosphors, researchers identified Y2O3:Yb, Er as the most effective material for camera-detected near-infrared signals. The technique employs near-infrared light to minimize tissue scattering, which typically limits traditional optical microscopy.
Timeline
September 19, 2026: The research findings were published.
The Tech Race
This development moves beyond the standard constraints of visible-light microscopy which defines modern biological imaging. It extends the capability of light-sheet microscopy platforms to compete with deeper-tissue imaging techniques currently limited by light absorption.
This development is currently in the research stage and does not impact clinical diagnostic workflows or standard microscopy equipment yet. The technique remains limited to specialized experimental laboratory environments, particularly those capable of X-ray excitation.
The takeaway
The research establishes a new performance benchmark for imaging deep tissue structures using X-ray-excited phosphors. Future studies should focus on the biocompatibility and resolution limits of this method during live-specimen observations.
Further reading
For more on the latest advancements in experimental optical measurement, visit the Physics section.
Source note: This article includes information reported by Nature.
