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ST: Fachverband Strahlen- und Medizinphysik

ST 7: Poster Session

ST 7.5: Poster

Donnerstag, 30. März 2017, 14:00–16:15, JUR Foyer

Measurement of Fissures in Femurs by High-Energy X-Ray Grating-Based Phase-Contrast Imaging — •Jonas Pfeiffer¹, Florian Horn¹, Georg Pelzer¹, Jens Rieger¹, Daniel Rusche¹, Thilo Michel¹, Kolja Gelse², Friedrich Paulsen³, and Gisela Anton¹ — ¹ECAP Medical Physics Group - FAU Erlangen-Nuremberg, Germany — ²Trauma surgery - FAU Erlangen-Nuremberg, Germany — ³Anatomical Institute - FAU Erlangen-Nuremberg, Germany

Grating-based phase-contrast Talbot-Lau interferometry is a method to obtain information about the attenuation, the phase-shift and small angle scattering strength (darkfield) of x-rays propagating through an sample simultaneously.

At a surgical implantation of an artificial hip joint, a medical nail is driven into the femur on which the new joint is fixed. Thereby the bone can brake and small fissures may occur creating instabilities between hip and thigh. Due to their small size such fine cracks are problematic to identify by conventional X-ray imaging. Grating-based phase-contrast Talbot-Lau interferometry may present a promising approach to improve diagnosis in this field, because of its sensitivity of material interfaces.

The aim of this study is to investigate the potential of the differential phase-contrast and the dark-field image to detect the filamentous structures of fissures.

First measurements showed very promising results.