Imaging characteristics of intravascular spherical contrast agents for grating-based x-ray dark-field imaging – effects of concentrations spherical sizes and applied voltage

摘要

Exemplary image of ATI, DFI and PCI acquired at a tube voltage of 60 kV. From left to right on position 1–4: Microbubbles with concentrations of 0.64, 0.32, 3.2 and 1.6 µg/ml. On position 5–6: H O and air in empty vial as reference material. On position 7–10: Microspheres with 1100, 900, 700, 500 µm size. The material between position 6–7 made of lead, respectively, between positions 7–8 and 9–10 made of paperboard, is to stabilize the syringes during the examination. Reconstruction and postprocessing of acquired data were performed using a combination of C++ and Matlab R2016A (Mathworks Inc, MA) software packages (see “Scanner setup and image acquisition” section in Materials & Methods).