Infrared thermal modulation endoscopy for label-free tumor detection.

Area of Science:

• Biomedical Optics
• Medical Imaging
• Thermal Imaging

Background:

• Optical imaging uses inherent temperature differences for tumor detection.
• Active infrared imaging with thermal modulation offers novel tumor assessment measures.
• Previous studies showed promising tumor characterization in mouse models using thermal modulation.

Purpose of the Study:

• To assess the clinical potential of endoscopic infrared thermal modulation imaging.
• To evaluate the feasibility of detecting in situ tumors using tissue cooling.
• To introduce and validate Infrared Thermal Modulation Endoscopy (ITME) for tumor detection.

Main Methods:

• Developed an endoscopic infrared thermal modulation imaging system with anti-reflection germanium lenses.
• Employed tissue cooling for thermal modulation.
• Evaluated the system in a syngeneic rectal tumor mouse model.

Main Results:

• Successfully localized and evaluated early-stage tumors based on heat signatures.
• Observed that tumors exhibited a higher rate of temperature change than adjacent tissues during thermal modulation.
• Demonstrated ITME as an effective method for optically delineating solid tumors.

Conclusions:

• ITME is a feasible and effective label-free technology for detecting and assessing solid tumors.
• The technology shows significant promise for improving the detection, classification, and characterization of abnormal tissues.
• Endoscopic infrared thermal modulation imaging offers a novel approach to optical tumor delineation.