ČSN EN ISO 19232-5 - Nedestruktivní zkoušení – Kvalita obrazu radiogramů – Část 5: Stanovení hodnot neostrosti obrazu a základního prostorového rozlišení pomocí dvojdrátkových měrek kvality obrazu

3.7 basic spatial detector resolution value

SRbdetector smallest geometrical detail, which can be resolved with a digital detector at magnification equal to one and corresponds to half of the measured detector unsharpness, UTvisual or UT20%, in a digital image and corresponds to the effective pixel size and is determined from the smallest number of the duplex wire pair, which is not separable by visual inspection or from the smallest number of the duplex wire pair with less than 20 % modulation depth in a linearized profile, measured with the IQI on the detector without object Note 1 to entry: For this measurement, the duplex wire IQI is placed directly on the digital detector array or imaging plate.