Abstract : Computed radiology (CR) is a widely used digital radiography technique that has largely replaced x-ray film radiography. Some quality parameters must be examined to ensure good contrast in x-ray images at Tribhuvan University Teaching Hospital, Nepal. We estimated and compared three quality parameters of Agfa and Konica photostimulable phosphor imaging systems: limiting spatial resolution, low contrast resolution, and image noise. Limiting spatial resolution and low contrast resolution of PSP system were evaluated by using a DIGRAD (pehamed) test phantom containing resolution test objects. Visual inspection was used to investigate the CR system’s limited spatial resolution and low contrast resolution. Image noise of the CR system was evaluated by acquiring images of the low contrast (Plexiglas) test phantom and measuring the standard deviation of pixel values within these specified ROIs with the ImageJ software tool. The limiting spatial resolution was found to be ⩾ 2.1 line pairs per millimeter for both the Agfa and Konica systems. The value of contrast difference was found to be greater than < 1.2% difference, image noise was found to be decreasing with increasing in applied dose, and the noise versus exposure curve was linear. This study shows that the limiting spatial resolution and low contrast resolution observed from the Agfa and Konica computed radiography systems are not in excellent quality at the working place. The image noise of the system is within the tolerable range at higher applied doses and is to be safe for diagnostic purposes.