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Figure 1
(a) MTF curves for the DE64 in counting mode at different dose rates, in integrating mode and the theoretical ideal curve. The inset is an enlarged view near the Nyquist frequency. (b) DE64 NPS curve comparison between integration and counting modes. (c) NPS curves for the DE64 in counting mode at different dose rates. The NPS was normalized to 1 for each dose rate. To reduce the noise in the NPS curves, a small moving average was used to smoothen the curves. (d) DQE curve of the DE64 in counting mode at different dose rates and in integrating mode, where ω is the spatial frequency. The DQE curves were smoothed using a cubic spline function. Dose rates are given in e− per pixel per second (e/p/s).

IUCrJ
Volume 6| Part 6| November 2019| Pages 1007-1013
ISSN: 2052-2525
https://doi.org/10.1107/S2052252519012661