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3D FIB-SEM image reconstruction of CNTLarge sample obtained with the double non-tilted milling method. a Orthogonal xy, xz and yz-views of the stack. b 3D view with semi-transparent rendering of the stack. To illustrate the possibility of manually tracing CNTs in 3D a few of the CNTs have been manually coloured blue in Amira. The white arrows point to the same CNT in both views. A alveoli, E erythrocyte, and P1 pneumocyte (type 1)
