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Future evolution of three-dimensional ultrastructural analysis of human biopsy samples. In FIB/SEM tomography, the imaged region of sample is completely lost because of FIB-milling (left panel). Array tomography is a potential solution to this problem (right panel). In this method, serial sectional SEM images are obtained from ultrathin serial sections mounted on a base. These ultrathin serial sections are physically stable and repeatedly observable.
