2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/153327An extension of the traditional modulation transfer function (MTF), the detective MTF, is proposed for the evaluation of the resolution of X-ray imaging detectors with non-uniform efficiency on the scale of individual detector elements. The dMTF is shown to give a better representation than does the MTF of the improved resolution reported when the readout of the detectors is enhanced.9 pages, 3 Postscript figures, submitted in NIM AInstrumentation and DetectorsMedical Physicstext