Probe localization using structure from motion for 3D ultrasound image reconstruction

摘要

This paper proposes an accurate ultrasound probe localization method for 3D US image reconstruction. The proposed method consists of (i) feature tracking of a video sequence and (ii) camera pose estimation using structure from motion (SfM). SfM is used to reconstruct 3D point clouds from multiple-view images and simultaneously estimate each camera position. To apply SfM to a video sequence, the accurate method is required to track features between adjacent frames. We employ a sub-pixel image matching technique using Phase-Only Correlation (POC) for feature tracking. POC is a technique of image matching using phase components in the Fourier transforms of images. Through a set of experiments, we demonstrate that the proposed method can estimate the location of the US probe with about 2mm error for the probe travel distance of 150-200mm.