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Ultrasound-guided spine interventions, such as lumbar-puncture procedures,often suffer from the reduced visibility of key anatomical features such as theinter-spinous process space, due to the complex shape of the self-shadowingvertebra. Therefore, we propose to design a wearable 3D ultrasound devicecapable of imaging the vertebra from multiple insonification angles to improvethe 3D bone surface visualization for interventional guidance. In this work, weaim to equip the imaging platform with a reconstruction algorithm takingadvantage of the redundant ultrasound beam angles. Specifically, we try toweight each beam's contribution for the same reconstructed voxel during thereconstruction process based on its incidence angle to the estimated bonesurface. To validate our approach, we acquired multi-angle ultrasound imagedata on a spine phantom with a tracked phased array transducer. The resultsshow that with the proposed method the bone surface contrast can besignificantly enhanced, providing clearer visual guidance for the clinician toperform spine intervention.

Insonification Angle-based Ultrasound Volume Reconstruction for Spine Intervention