Autofluorescence imaging for improved visualization of joint structures during arthroscopic surgery

Area of Science:

• Orthopedic Surgery
• Medical Imaging Technology
• Biomedical Engineering

Background:

• Arthroscopic surgery requires enhanced visualization for precision.
• Current methods struggle to differentiate critical joint structures.
• Autofluorescence imaging (AFI) offers potential for real-time contrast enhancement.

Purpose of the Study:

• To develop and validate an arthroscopic autofluorescence imaging (AFI) system.
• To improve visualization of the femoral insertion site during anterior cruciate ligament (ACL) reconstruction.
• To enhance contrast between joint structures using real-time autofluorescence.

Main Methods:

• Developed an AFI system prototype based on spectral responses (SR) of joint tissues.
• Measured spectral responses of the femoral insertion site and surrounding tissues using a fluorospectrometer.
• Validated system accuracy by comparing segmented insertion sites on white light and autofluorescence images.

Main Results:

• Joint structures exhibit distinct spectral responses.
• Spectral unmixing successfully separated SRs, improving contrast between structures.
• The AFI system achieved high accuracy in visualizing the femoral insertion site.

Conclusions:

• The AFI system enables accurate visualization of the femoral insertion site using autofluorescence and spectral unmixing.
• The system facilitates anatomic ACL reconstruction through real-time, subject-specific visualization.
• AFI holds potential for broader arthroscopic procedures and diagnostic applications.