Value of a laser guidance system for CT interventions: a phantom study

Area of Science:

• Medical Imaging and Interventional Radiology
• Biomedical Engineering

Background:

• Image-guided procedures are crucial for accurate targeting in minimally invasive interventions.
• Laser guidance systems offer potential for enhanced precision and reduced invasiveness.
• Computerized tomography (CT) is a primary modality for interventional guidance.

Purpose of the Study:

• To assess the usability and efficacy of a novel laser puncture system.
• To compare the accuracy of laser-assisted versus conventional puncture techniques.
• To evaluate the system's utility for both experienced and novice physicians.

Main Methods:

• A laser guidance system with tacking optics was mounted on a computer tomography (CT) scanner.
• Physicians (3 experienced, 7 novice) performed phantom punctures using the system with and without laser guidance.
• Punctures were conducted at various single and double angulations, with needle tip to target distance measured.

Main Results:

• The laser puncture system demonstrated problem-free handling.
• Experienced physicians showed no significant accuracy difference with or without the laser, except in one double angulation scenario.
• Novice physicians exhibited significant accuracy improvements (P < 0.001, P < 0.05) with laser assistance, indicating enhanced learning and confidence.

Conclusions:

• The laser guidance system significantly improves puncture accuracy for novice physicians in CT-guided procedures.
• While experienced physicians showed minimal gains, the system offers substantial educational benefits and confidence-building for beginners.
• The laser system is a promising tool for training and enhancing precision in interventional radiology.