Fig. 12.

Image lag results from residual signals from previous exposures being superimposed on the current image. The magnitude of the lag can be quite extensive (e.g., 5–0% of the previous signal) and easily observed (left figure). Poor temporal resolution and potential artifacts are drawbacks. Methods such as detector ‘backlighting–are being implemented to reduce or eliminate the residual lag (image from Philips Medical Systems website [11])