Space-time tomography for continuously deforming objects

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25 Scopus citations


X-ray computed tomography (CT) is a valuable tool for analyzing objects with interesting internal structure or complex geometries that are not accessible with optical means. Unfortunately, tomographic reconstruction of complex shapes requires a multitude (often hundreds or thousands) of projections from different viewpoints. Such a large number of projections can only be acquired in a time-sequential fashion. This significantly limits the ability to use x-ray tomography for either objects that undergo uncontrolled shape change at the time scale of a scan, or else for analyzing dynamic phenomena, where the motion itself is under investigation. In thiswork,we present a non-parametric space-time tomographic method for tackling such dynamic settings. Through a combination of a new CT image acquisition strategy, a space-time tomographic image formation model, and an alternating, multi-scale solver, we achieve a general approach that can be used to analyze a wide range of dynamic phenomena.We demonstrate our method with extensive experiments on both real and simulated data.

Original languageEnglish (US)
Article numberA61
JournalACM transactions on graphics
Issue number4
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© 2018 Copyright held by the owner/author(s).


  • 4D reconstruction
  • Optimization
  • X-ray computed tomography

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design


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