MEMORY ARTIFACT RELATED TO SELENIUM-BASED DIGITAL RADIOGRAPHY SYSTEMS

Digital images acquired on radiography systems with amorphous selenium detectors are susceptible to ''memory artifacts'' from prior x-ray ex posures. In routine clinical use and in a laboratory experiment, artif acts appeared in chest radiographs until the selenium recovered from i nitial exposure. Memory artifacts were eliminated when 3 minutes or mo re elapsed between acquisition of a lateral chest radiograph and acqui sition of the next radiograph.