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Effect of additive noise on the detected spectrum and DQE. (A) The detected spectrum without coincidence rejection. (B) The detected spectrum with perfect coincidence rejection, showing that charge sharing effects at the nominal additive noise level tend to dominate over additive noise unless coincidence rejection is employed. (C) and (D) Zero-frequency DQE computed as a function of energy threshold (C) without coincidence rejection and (D) with perfect coincidence rejection.
