Intraoperative bile duct visualization using near-infrared hyperspectral video imaging

Area of Science:

• Surgical imaging technologies
• Minimally invasive surgery
• Biliary system visualization

Background:

• Current cholecystectomy imaging methods are complex and carry a risk of bile duct injury.
• A novel approach is needed for intraoperative imaging of the biliary system.

Purpose of the Study:

• To develop and evaluate a near-infrared, hyperspectral imaging system for enhanced intraoperative visualization of the biliary system.
• To enable surgeons to see through the hepatoduodenal ligament during cholecystectomy.

Main Methods:

• A laparoscopic-capable, near-infrared, hyperspectral imaging system was constructed.
• The system utilizes a tunable liquid crystal filter (650-1,100 nm) to capture spectroscopic image data.
• Data are processed into a 3D hyperspectral cube, deconvoluting spatial and spectral information for chemical property imaging.

Main Results:

• The system successfully imaged porcine biliary structures.
• Distinct spectral signatures were identified for the common bile duct (lipid shoulder at 930 nm, water peak at 970 nm).
• Vascular structures showed characteristic absorption peaks for hemoglobin and water.

Conclusions:

• A novel device for enhanced intraoperative biliary imaging has been designed and built.
• This system allows visualization of the biliary system through the hepatoduodenal ligament without prior dissection.
• The technology has the potential to prevent bile duct injuries during cholecystectomy.