Accuracy of a 3D fluoroscopic navigation system using a flat-panel detector-equipped C-arm.

Area of Science:

• Medical Imaging
• Surgical Navigation
• Orthopedic Surgery

Background:

• 3D fluoroscopic navigation systems enhance surgical precision.
• Flat-panel detector C-arms offer advanced imaging capabilities.
• Assessing navigation accuracy relative to imaging center distance is crucial.

Purpose of the Study:

• To evaluate the accuracy of a novel 3D fluoroscopic navigation system.
• To determine the impact of imaging center distance on navigation accuracy.
• To assess the system's suitability for clinical application in hip surgery.

Main Methods:

• A geometric phantom with 25 markers was used to assess accuracy.
• Hip joint surgery was simulated using dry pelvic and femoral bones with 8 markers.
• Target Registration Error (TRE) was measured at varying distances from the fluoroscopic imaging center.

Main Results:

• The geometric phantom study showed a mean TRE of 0.7 mm.
• TRE increased significantly at 5 cm from the imaging center compared to 1-2 cm.
• The dry bone study yielded a mean TRE of 0.9 mm (acetabulum) and 1.0 mm (femur).
• Overall TRE was <1 mm in 90% of trials and <1.5 mm in 100%.

Conclusions:

• The novel 3D fluoroscopic navigation system demonstrates acceptable accuracy for clinical use.
• Flat-panel detector 3D C-arms improve the feasibility of 3D fluoroscopic navigation.
• Minimizing image distortion effects enhances navigation accuracy in surgical applications.