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Title: Quantitative electron density characterization of soft tissue substitute plastic materials using grating-based x-ray phase-contrast imaging

Many scientific research areas rely on accurate electron density characterization of various materials. For instance in X-ray optics and radiation therapy, there is a need for a fast and reliable technique to quantitatively characterize samples for electron density. We present how a precise measurement of electron density can be performed using an X-ray phase-contrast grating interferometer in a radiographic mode of a homogenous sample in a controlled geometry. A batch of various plastic materials was characterized quantitatively and compared with calculated results. We found that the measured electron densities closely match theoretical values. The technique yields comparable results between a monochromatic and a polychromatic X-ray source. Measured electron densities can be further used to design dedicated X-ray phase contrast phantoms and the additional information on small angle scattering should be taken into account in order to exclude unsuitable materials.
Authors:
; ; ;  [1] ; ; ;  [2] ; ;  [3] ;  [1] ;  [4]
  1. Lehrstuhl für Biomedizinische Physik, Physik-Department and Institut für Medizintechnik, Technische Universität München, 85748 Garching (Germany)
  2. GE Global Research, 85748 Garching (Germany)
  3. QRM GmbH, Möhrendorf (Germany)
  4. (France)
Publication Date:
OSTI Identifier:
22305891
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 62 RADIOLOGY AND NUCLEAR MEDICINE; ANIMAL TISSUES; ELECTRON DENSITY; GRATINGS; IMAGES; INTERFEROMETERS; MONOCHROMATIC RADIATION; PLASTICS; RADIOTHERAPY; SMALL ANGLE SCATTERING; X RADIATION; X-RAY RADIOGRAPHY; X-RAY SOURCES