Figure 1From: Cluster-based segmentation of dual-echo ultra-short echo time images for PET/MR bone localization Dual-echo UTE space. Partitions of the dual-echo UTE space yielded by R 2 thresholding (continuous lines) at 0, 250, 500, 750, and 1,000 s-1 and normalized difference thresholding (dashed lines) at 10-2, 10-3, 10-4, 10-5, and 10-6.Back to article page