Improving the detection efficiency and modulation transfer function of lens-coupled indirect X-ray imaging detectors based on point spread functions simulated according to lens performance parameters

Wang, Y.; Li, G.; Zhang, J.; Yi, Q.; Zhao, Y.; Li, K.; Zhu, Y.; Jiang, X.

doi:10.1107/S1600577518007889

Journal of Synchrotron Radiation Journal of
Synchrotron Radiation

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Figure 9
(a) Ideal image in object space with a spatial frequency of about 127 line-pairs mm⁻¹ and a contrast of 90.48% for the 10× objective. (b) Ideal image in object space with a spatial frequency of about 508 line-pairs mm⁻¹ and a contrast of 90.48% for the 40× objective. (g, h) Diagrams of the contrast in the blurred images after images (a) and (b) were convolved with the PSFs from Fig. 8

. For each case there is a PSF that maximizes the contrast in the blurred images. We call this corresponding PSF the detector's best-focus PSF. The positions of the best focus were marked in the curves. (c)–(f) Blurred images which are simulated at the positions marked in (h) when the 40× objective was focused on a 20 µm-thick GGG:Tb. We can see that the blurred image in the best focus position has the best image quality.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 25| Part 4| July 2018| Pages 1093-1105

https://doi.org/10.1107/S1600577518007889

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