Regensburg 2013 – wissenschaftliches Programm
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ST: Fachverband Strahlen- und Medizinphysik
ST 3: Advances in X-Ray Imaging II
ST 3.1: Vortrag
Mittwoch, 13. März 2013, 16:40–17:00, H41
Spectral phase-contrast CT using the LAMBDA detector — Sebastian Ehn1, Michael Epple1, Guillaume Potdevin1, •David Pennicard2, Sergej Smoljanin2, Sabine Lange2, Dieter Renker1, Heinz Graafsma2, and Franz Pfeiffer1 — 1Chair of Biomedical physics, TU München — 2DESY, Hamburg
X-ray phase-contrast techniques offer significantly improved soft-tissue contrast compared to absorption-based measurements commonly used in clinical radiology. Grating-based phase contrast methods have proven to be fully compatible to standard laboratory X-ray sources and are currently being used in preclinical research.
However, the imaging quality in this method is strongly energy-dependent, which may result in poor signal to noise ratios when using beams with broad energy spectra.
One can overcome this disadvantage using energy sensitive detectors like the Medipix3, only taking into account the energies where the SNR is at a maximum. Thereby, an improvement to image quality and a reduction in radiation dose may be reached.
This presentation will give an overview over the new Medipix3-based LAMBDA detector, which is currently being developed at DESY, used in grating-based spectral phase-contrast tomography.