Figure 6From: Magnetic microbubble-mediated ultrasound-MRI registration based on robust optical flow modelIterative segmentation process of MRI with active contour model. (a) 50 iterations of MRI without MMBs. (b) segmentation result of MRI without MMBs. (c) 50 iterations of MRI with MMBs. (d) segmentation result of MRI with MMBs.Back to article page