Noise analysis of grating-based x-ray differential phase contrast imaging
- Photonics Division, CSEM SA, 8005 Zuerich (Switzerland)
- Physics Institute, University of Zuerich, 8057 Zuerich (Switzerland)
The sensitivity of x-ray radiographic images, meaning the minimal detectable change in the thickness or in the index of refraction of a sample, is directly related to the uncertainty of the measurement method. In the following work, we report on the recent development of quantitative descriptions for the stochastic error of grating-based differential phase contrast imaging (DPCi). Our model includes the noise transfer characteristics of the x-ray detector and the jitter of the phase steps. We find that the noise in DPCi depends strongly on the phase stepping visibility and the sample properties. The results are supported by experimental evidence acquired with our new instrument with a field of view of 50x70 mm{sup 2}. Our conclusions provide general guidelines to optimize grating interferometers for specific applications and problems.
- OSTI ID:
- 22053793
- Journal Information:
- Review of Scientific Instruments, Vol. 81, Issue 7; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
Similar Records
Characterization of imaging performance in differential phase contrast CT compared with the conventional CT: Spectrum of noise equivalent quanta NEQ(k)
Noise in x-ray grating-based phase-contrast imaging