Investigation of noise properties in grating-based x-ray phase tomography with reverse projection method

Bao Yuan†^a),^b), Wang Yan^b), Gao Kun^a), Wang Zhi-Li^a), Zhu Pei-Ping‡^a),^b), Wu Zi-Yu^a),^b)

The log–log plots of relative noise variance versus spatial resolution, showing (a) the ACT results, where the fitted curve follows the form , with R ² = 1. ( R ² is the coefficient of multiple determination. This statistic measures how successful the fit is in explaining the variation of the data.), and (b) the PCT results, where the fitted curve follows the form , with R ² = 0.9852.