To directly compare the two technologies, we have measured the image properties for a commercial amorphous silicon/cesium iodide flat-panel based digital chest system and a commercial CR system under clinical imaging conditions. However, most image quality measurements reported on flat-panel systems have been performed on prototype systems in laboratories while those for CR systems were typically independently performed and reported on in separate studies.
It has been shown that this new detector technology offers better image quality and various operational advantages over the computed radiography (CR) which to date has been the most widely implemented and used digital radiography technique. The DQEs of the flat-panel system were found to increase with the exposure while those of the CR system decrease slightly with the exposure.Ībstract = "Amorphous silicon (a-Si:H) flat-panel (FP) imaging systems have recently become commercially available for both chest and mammographic imaging applications. The results show that the flat-panel system has slightly lower MTF but significantly higher DQEs than the CR system. Methods and issues related to these measurements are discussed. In this paper, measurements of image quality metrics, including the modulation transfer functions (MTFs), noise power spectra (NPSs), and detective quantum efficiencies (DQEs), for the FP and CR systems are presented and compared.
Amorphous silicon (a-Si:H) flat-panel (FP) imaging systems have recently become commercially available for both chest and mammographic imaging applications.