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. Author manuscript; available in PMC: 2016 Oct 14.
Published in final edited form as: Adv Mater. 2015 Jun 18;27(38):5638–5663. doi: 10.1002/adma.201501015

Figure 4.

Figure 4

a) The mismatch between information sampled by a 17-image tilt series with equal angular increments (red dots) and a square Cartesian grid. The interpolation method used to combine this data can strongly influence the final reconstruction. Radon back-projection is used to avoid interpolation in space interpolation. b) A simplified example of Radon back-projection for a set of 3 low-tilt projections producing 5 possible object locations (black dots). c) The addition of a high-tilt projection uniquely defines the existence and location of only 3 objects.