3D Rigid Registration of Intraoperative Ultrasound and Preoperative MR Brain Images Based on Hyperechogenic Structures

Figure 6

Patient 2. Left: registration given by the neuronavigation system. Right: results after correction with our registration approach. The low intensities of US images are in green and the high in red. In this case, the acoustic shadow artifact was present on the US image. The signal below the lesion was totally dark as shown in Figure 3. The proposed approach allowed to overcome these artifacts without specific detection of the shadows.