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The performance of the dual-hierarchical strategy. The reconstructions of sagittal, horizontal and coronal planes of the linear (a), first level (b), and second level (c) registration results are the fused results of the fixed image (purple) and the moving image after registration (green). The projection thickness is 10 μm. The enlarged views of the local regions shown on the right correspond to the white boxes on the left. Scale bars: 1 mm, detail 0.5 mm
