Evaluation and Comparison of Target Registration Error in Active and Passive Optical Tracking Systems

Area of Science:

• Medical Imaging
• Surgical Navigation
• Optical Tracking Technology

Background:

• Image-guided surgery relies on accurate tracking of surgical tools.
• Optical tracking systems are crucial components in image-guided surgery setups.
• Understanding tracking system error is vital for surgical precision.

Purpose of the Study:

• To compare the Target Registration Error (TRE) of one passive and two active optical tracking systems.
• To evaluate the impact of measurement volume size, instrument length, and environmental conditions on tracking accuracy.
• To determine the suitability of these systems for orthopedic procedures.

Main Methods:

• Two experiments were conducted to measure system accuracy.
• Target Registration Error (TRE) was the primary metric for comparison.
• Systems were tested under varying conditions relevant to orthopedic surgery.

Main Results:

• Active optical tracking systems showed significantly higher accuracy than the passive system.
• The active systems achieved an overall accuracy of 0.063 mm (SD = 0.025).
• The passive system reported an overall accuracy of 0.259 mm (SD = 0.152).

Conclusions:

• Active optical tracking systems offer superior precision for image-guided surgery compared to passive systems.
• The findings support the use of active optical tracking in orthopedic procedures requiring high accuracy.
• Further research may explore optimization of tracking systems under diverse surgical conditions.