Simultaneous wood and metal particle detection on dark-field radiography

Eva-Maria Braig, Lorenz Birnbacher, Florian Schaff, Lukas Gromann, Alexander Fingerle

Research output: Contribution to journalArticleResearchpeer-review


Background: Currently, the detection of retained wood is a frequent but challenging task in emergency care. The purpose of this study is to demonstrate improved foreign-body detection with the novel approach of preclinicalX-ray dark-field radiography.
Methods: At a preclinical dark-field x-ray radiography, setup resolution and sensitivity for simultaneous detection ofwooden and metallic particles have been evaluated in a phantom study. A clinical setting has been simulated witha formalin fixated human hand where different typical foreign-body materials have been inserted. Signal-to-noiseratios (SNR) have been determined for all test objects.
Results: On the phantom, the SNR value for wood in the dark-field channel was strongly improved by a factor 6compared to conventional radiography and even compared to the SNR of an aluminium structure of the same sizein conventional radiography. Splinters of wood < 300 μm in diameter were clearly detected on the dark-fieldradiography. Dark-field radiography of the formalin-fixated human hand showed a clear signal for wooden particlesthat could not be identified on conventional radiography.
Conclusions: x-ray dark-field radiography enables the simultaneous detection of wooden and metallic particles inthe extremities. It has the potential to improve and simplify the current state-of-the-art foreign-body detection.
Original languageEnglish
Article number1
Number of pages7
JournalEuropean Radiology Experimental
Publication statusPublished - 2018
Externally publishedYes


  • Radiography
  • Foreign bodies
  • Extremities
  • Hand
  • Dark-field contrast

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