Detection and visualization of dural pulsation for spine needle interventions

Area of Science:

• Anesthesiology
• Medical Imaging
• Biomedical Engineering

Background:

• Epidural and spinal anesthesia traditionally rely on palpation for needle placement.
• Ultrasound guidance is increasingly used for spinal interventions.
• Detecting dural pulsation is crucial but often difficult.

Purpose of the Study:

• To present a novel method for automatic detection of subtle dural pulsation from live ultrasound video.
• To improve the accuracy and efficiency of ultrasound-guided spinal needle interventions.

Main Methods:

• Fitting a periodic model to B-mode intensity values using extended Kalman filtering.
• Utilizing fitted frequencies and amplitudes for dural pulsation detection and visualization.
• Validating the method retrospectively on synthetic and human video, and in real-time on a spinal phantom.

Main Results:

• The method successfully detected subtle dural pulsation, proving robust to noise and motion.
• Pulsation visualization reduced normalized path length and the number of attempts in a mock epidural procedure.

Conclusions:

• The technique effectively localizes the dura and aids in identifying clear needle trajectories.
• Real-time application on commercial ultrasound systems shows potential to enhance ultrasound-guided spine needle interventions.