Abstract
We investigated characteristics of several matching measures between preoperative 3D-CTA and intraoperative fluoroscopic images. In this study, DRR (Digitally Reconstructed Radiograph) are generated by voxel projection of 3D-CTA after extracting an aorta region. By increasing/decreasing CT value in the aorta region of CTA, DRR with/without contrast media injection are obtained. Subsequently we calculate matching measures between DRR and fluoroscopic images iteratively by changing imaging parameters. The most similar DRR to fluoroscopic image is selected. From simulation results, we think mutual information and residual of M-estimator are suitable because estimation error is small and distribution of matching measure has sharp peak.
