Increasing the field of view in grating based X-ray phase contrast imaging using stitched gratings
| Autor: | Jan Meiser, Tobias J. Schröter, Joachim Schulz, Franz Pfeiffer, Alexander Hipp, Frieder Koch, Marian Willner, Julia Herzen, Abrar Faisal, Thomas Duttenhofer, Sebastian Ehn, Maximilian Amberger, Jens Rieger, Andreas Hofmann, Marco Walter, Lorenz Birnbacher, Markus Schüttler, Pascal Meyer, Danays Kunka, Jürgen Mohr, Thomas Weber |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Image quality Field of view 02 engineering and technology Grating 030218 nuclear medicine & medical imaging Image stitching 03 medical and health sciences 0302 clinical medicine Optics Image Processing Computer-Assisted Animals Radiology Nuclear Medicine and imaging Electrical and Electronic Engineering Instrumentation Lithography Radiation business.industry Equipment Design 021001 nanoscience & nanotechnology Condensed Matter Physics Radiography Interferometry X-Ray Phase-Contrast Imaging Optoelectronics Anura 0210 nano-technology LIGA business |
| Zdroj: | Journal of X-Ray Science and Technology. 24:379-388 |
| ISSN: | 1095-9114 0895-3996 |
| DOI: | 10.3233/xst-160552 |
| Popis: | Grating based X-ray differential phase contrast imaging (DPCI) allows for high contrast imaging of materials with similar absorption characteristics. In the last years' publications, small animals or parts of the human body like breast, hand, joints or blood vessels have been studied. Larger objects could not be investigated due to the restricted field of view limited by the available grating area. In this paper, we report on a new stitching method to increase the grating area significantly: individual gratings are merged on a carrier substrate. Whereas the grating fabrication process is based on the LIGA technology (X-ray lithography and electroplating) different cutting and joining methods have been evaluated. First imaging results using a 2×2 stitched analyzer grating in a Talbot-Lau interferometer have been generated using a conventional polychromatic X-ray source. The image quality and analysis confirm the high potential of the stitching method to increase the field of view considerably. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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