[Spatial resolution of digital systems: is the visual determination with a lead bar pattern meaningful?].
The factors influencing the spatial resolution of digital detectors are discussed and demonstrated on simulated bar pattern images. Lead bar patterns are often used in quality control procedures to test the spatial resolution of image detectors. In digital imaging systems the pixelization of the detector interferes with the periodic bar pattern and makes it difficult to determine the resolution limit. Bar pattern images seem to have only limited value for characterizing the imaging performance of digital detector systems.
Neitzel
U
U
Philips Medical Systems, Hamburg. ulrich.neitzel@philips.com
D006801:Humans; D011785:Quality Assurance, Health Care; D011856:Radiographic Image Enhancement / Q000379:methods / Q000592:standards*; D013679:Technology, Radiologic