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Figure 2
(a) Acquisition scheme for tomograms in the parallel-beam geometry (SPEC: control software; and TG4001: pulse generator). (b) Comparison of the rotary encoder signal (red/green) and the 35 ms trigger signals from the pulse generator (purple). Two projections are separated by 0.12°. Within 50 ms the rotary encoder returns three oscillations with a step size of 0.04° per oscillation. (c) Unwrapping the arctangent signal of the rotary encoder delivers a linear angular position curve over time. |
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