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Correction for mechanical inaccuracies in a scanning Talbot-Lau interferometer
  • +17
  • Wolfgang Noichl ,
  • Fabio De Marco ,
  • Konstantin Willer ,
  • Theresa Urban ,
  • Manuela Frank ,
  • Rafael Schick ,
  • Bernhard Gleich ,
  • Lorenz Hehn ,
  • Alex Gustschin ,
  • Pascal Meyer ,
  • Thomas Koehler ,
  • Hanns-Ingo Maack ,
  • Klaus-Jürgen Engel ,
  • Bernd Lundt ,
  • Bernhard Renger ,
  • Alexander Fingerle ,
  • Daniela Pfeiffer ,
  • Ernst Rummeny ,
  • Julia Herzen ,
  • Franz Pfeiffer
Wolfgang Noichl
Technische Universität München

Corresponding Author:[email protected]

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Fabio De Marco
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Konstantin Willer
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Theresa Urban
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Manuela Frank
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Rafael Schick
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Bernhard Gleich
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Lorenz Hehn
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Alex Gustschin
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Pascal Meyer
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Thomas Koehler
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Hanns-Ingo Maack
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Klaus-Jürgen Engel
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Bernd Lundt
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Bernhard Renger
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Alexander Fingerle
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Daniela Pfeiffer
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Ernst Rummeny
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Julia Herzen
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Franz Pfeiffer
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Abstract

Grating-based X-ray phase-contrast and in particular dark-field radiography are promising new imaging modalities for medical applications. Currently, the potential advantage of dark-field imaging in early-stage diagnosis of pulmonary diseases in humans is being investigated. These studies make use of a comparatively large scanning interferometer at short acquisition times, which comes at the expense of a significantly reduced mechanical stability as compared to tabletop laboratory setups. Vibrations create random fluctuations of the grating alignment, causing artifacts in the resulting images. Here, we describe a novel maximum likelihood method for estimating this motion, thereby preventing these artifacts. It is tailored to scanning setups and does not require any sample-free areas. Unlike any previously described method, it accounts for motion in between as well as during exposures.
2023Published in IEEE Transactions on Medical Imaging on pages 1-1. 10.1109/TMI.2023.3288358