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Figure 9. Graph illustrates the DQE curves for four digital detectors. CR 1 = needle-structured storage phosphor and line scanner (MD5.0/DX-S; Agfa-Ge-vaert, Mortsel, Belgium), CR 2 = unstructured storage phosphor and flying-spot scanner (MD40/ADC Compact, Agfa-Gevaert), Indirect FPD = CsI-based flat-panel detector (Pixium 4600; Trixell, Moirans, France), Direct FPD = selenium-based flat-panel detector (DR 9000; Kodak, Rochester, NY).