Journal article
Structured scintillators for X-ray imaging with micrometre resolution
Metal Structures in Four Dimensions, Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
KTH Royal Institute of Technology4
European Synchrotron Radiation Facility5
A 3D X-ray detector for imaging of 30–200 keV photons is described. It comprises a stack of semitransparent structured scintillators, where each scintillator is a regular array of waveguides in silicon, and with pores filled with CsI. The performance of the detector is described theoretically and explored in detail through simulations.
The resolution of a single screen is shown to be determined only by the pitch, at least up to 100 keV. In comparison to conventional homogenous screens an improvement in efficiency by a factor 5–15 is obtainable. The cross-talk between screens in the 3D detector is shown to be negligible. The concept of such a 3D detector enables ray tracing and super resolution algorithms to be applied.
Realized pore geometries have a lower aspect ratio than used in simulations and the roughness of the pore walls gives a 13% decrease in waveguide efficiency. Compared to currently used regular scintillators with similar resolution an efficiency increase by a factor 4 has been found for the structured scintillator.
| Language: | English |
|---|---|
| Year: | 2009 |
| Pages: | 141-144 |
| ISSN: | 18729576 and 01689002 |
| Types: | Journal article |
| DOI: | 10.1016/j.nima.2009.03.139 |
| ORCIDs: | Olsen, Ulrik Lund , Schmidt, Søren and Poulsen, Henning Friis |
Materialeforskning Materialekarakterisering og materialemodellering Materials characterization and modelling Materials research
