[A-mode ultrasonic pointer for navigated pelvic surgery]

Area of Science:

• Medical Imaging
• Surgical Navigation
• Biomedical Engineering

Background:

• Fluoroscopy is common in surgical navigation but lacks detail for pelvic procedures.
• Computed tomography (CT) offers superior imaging for pelvic surgeries but requires accurate patient-to-data matching.
• Current surface-matching techniques for CT-based navigation often require extensive bone exposure, contradicting minimally invasive principles.

Purpose of the Study:

• To develop and evaluate a noninvasive method for matching CT data with the patient's pelvic bone.
• To improve the precision of computer-assisted pelvic surgery by enhancing surface-matching techniques.
• To integrate an A-mode ultrasonic pointer for minimally invasive pelvic bone surface matching.

Main Methods:

• Integration of an A-mode ultrasonic pointer with a surgical navigation system.
• Application of extended surface matching using the ultrasonic pointer on pelvic bone.
• Comparison of precision between the ultrasonic method and conventional solid pointer surface matching.

Main Results:

• The ultrasonic pointer enabled noninvasive extended surface matching of the pelvic bone.
• Achieved precision comparable to, and in some aspects improved over, conventional methods.
• Demonstrated the feasibility of minimally invasive surface matching for CT-based pelvic navigation.

Conclusions:

• An A-mode ultrasonic pointer offers a viable, minimally invasive alternative for pelvic bone surface matching in surgical navigation.
• This approach enhances the precision of computer-assisted surgery for complex pelvic procedures.
• The technology supports the core tenet of minimally invasive surgery by reducing soft tissue exposure.