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Published on: February 3, 2016
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High Spatial and Temporal Resolution NIR-IIb Gastrointestinal Imaging in Mice.
Chao Mi1, Ming Guan2, Xun Zhang2
1Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology & Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, Guangdong 518055, China.
Nano Letters
|March 24, 2022
Summary
This study introduces a noninvasive imaging technique using special nanocrystals for better gastrointestinal tract visualization. The new method offers higher resolution and speed, aiding in disease diagnosis.
Area of Science:
- Biomedical Optics
- Nanotechnology
- Medical Imaging
Background:
- Conventional gastrointestinal (GI) imaging methods like endoscopy and MRI have limitations in resolution and invasiveness.
- There is a need for advanced imaging techniques to improve GI tract visualization for prognosis and therapy.
Purpose of the Study:
- To develop a noninvasive imaging method for the GI tract using lanthanide-doped nanocrystals.
- To enhance spatial and temporal resolution for improved diagnostic capabilities.
Main Methods:
- Utilized lanthanide-doped nanocrystals emitting fluorescence in the near-infrared-IIb (NIR-IIb) window (1500-1700 nm).
- Employed a light-sheet imaging system for three-dimensional (3D) imaging.
- Achieved high absolute quantum yield (QY) up to 48.6%.
Main Results:
- Achieved a spatial resolution of approximately 1 mm in GI tract imaging, a threefold improvement over NIR-IIa methods.
- Demonstrated a high temporal resolution of 8 frames per second, enabling capture of intestinal peristalsis.
- Successfully translated the technology for diagnosing inflammatory bowel disease in mice.
Conclusions:
- The NIR-IIb nanocrystal-based imaging offers superior spatial and temporal resolution for GI tract visualization.
- This noninvasive approach shows significant potential for diagnosing GI diseases like inflammatory bowel disease.
- The developed method represents a breakthrough in biomedical imaging for gastrointestinal applications.
