1. A method for detecting scintillator hysteresis artifacts in an image from an x-ray detector, said method including: examining an image from an x-ray detector to measure a first signal level for a first area of interest and a second signal level for a second area of interest, wherein said first area of interest includes a first image area and said second area includes a second image area; determining a difference in said first signal level and said second signal level; and comparing said difference to a threshold.