Non-contact Imaging of Breast Surface for Breast Surgical Planning

摘要

Objective and accurate surface measurements of the human breast are important for surgical planning. Traditionally,surgeons plan their procedures using radiographic images, but these images do not illustrate the breast in the surgicalposition (i.e. supine position). As a result, surgeons need to account for differences in breast size and shape, and surgicaloutcome is largely dependent on the surgeon’s experience. Previous studies have shown that scanning large-breastedpatients in the standing position resulted in breast ptosis and high variability. A system capable of accurately scanningpatients in the supine position is therefore desirable. The aim of this work was to develop a non-contact imaging systemthat can provide 3D information of each breast surface from patients in the supine position. Two structured-light surfacescanners were combined using separate colour optical filters to minimize cross-talk between scanners. Test scans werecollected from a 3D printed breast phantom in both the supine and standing positions. Scanning with blue and greenfilters simultaneously at two different angles eliminated shadowing artifacts compared to a single scanner reconstruction.The mean error distance between the phantom CAD model and point cloud measurements was 0.1 ± 0.1 mm for bothstanding and supine positions. Our system performed better than currently available commercial systems, which haveaccuracy of 0.5 - 1 mm.