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AKB: Biologische Physik
AKB 50: Poster Session "Biological Physics"
AKB 50.38: Poster
Freitag, 12. März 2004, 10:30–13:00, B
Coherent Scatter Computed Tomography — •Johannes Delfs1, Jens-Peter Schlomka1, and Robert L. Johnson2 — 1Philips Research Laboratories Hamburg, Röntgenstrasse 24-26, 22335 Hamburg, Germany — 2Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
The dominant component of low-angle scatter in the energy regime of diagnostic radiology ( 60 keV) is coherent scatter. This leads to the phenomenon of x-ray diffraction, which is widely used for determining atomic structure in material science.
A reconstructive tomographic imaging technique (No-dqCoherent Scatter Computed Tomography (CSCT) No-dq) is presented for the spatially-resolved measurement of the coherent scatter cross-section in extended objects. These diffraction patterns supplement conventional CT images in material discrimination.The technique is based on the energy analysis, at known angle, of coherent x-ray scatter by polychromatic radiation employing a novel energy-resolving CdZnTe detector array. Images of test objects are shown to illustrate the feasibility of the technique and potential applications in medicine and industrial material inspection.