Readout sequence for residual image elimination in a radiation detection panel

A process for removing residual prior image information from new image information generated by radiation exposure of an image detection array which contains a plurality of radiation sensitive picture elements (pixels) comprising a photoconductor layer, wherein said detectors store electrical charges when the photoconductor layer is exposed to incident radiation, the process comprising in the following order the steps of:

• I) continuously operating the array between image exposures;
• II) obtaining and storing for each pixel pre-exposure data representing a residual charge read out from the pixel prior to a new image exposure;
• III) operating and exposing the photoconductor layer of the array to imaging radiation;
• IV) obtaining and storing for each pixel exposure data read out from the detection panel, representing an image charge due to the image exposure;
• V) for each pixel subtracting the pre-exposure data from the exposure data to obtain corrected exposure data;
• and
• VI) displaying said corrected exposure data.

A process for correcting residual artifacts in an electronic signal representing an image comprising a plurality of pixels, said image resulting from the exposure of a detector which comprises a photoconductor layer to imaging radiation, the process comprising:

• I) operating the detector without exposing said photoconductor layer to imaging radiation and obtaining a pre-exposure electronic signal containing prior exposure residual image artifacts from said plurality of pixels;
• II) operating the detector a second time, exposing said photoconductor layer to imaging radiation and obtaining an exposure electronic signal from the plurality of pixels;
• III) operating the detector a third time, following exposure to imaging radiation, again without exposing the photoconductor to imaging radiation, to obtain a post-exposure electronic signal;
• IV) averaging the pre-exposure and post-exposure signals for each pixel to obtain an average electronic signal;
• and
• V) subtracting said average signal from the exposure signal, pixel by pixel, to produce a corrected exposure electronic signal.

A process for removing residual prior image information from new image information generated by radiation exposure of an image detection array which contains a plurality of radiation sensitive picture elements (pixels) comprising a photoconductor layer, wherein said detectors store electrical charges when the photoconductor layer is exposed to incident radiation, the process comprising in the following order the steps of:

• I) continuously operating the array between image exposures;
• II) obtaining and storing for each pixel pre-exposure data representing a residual charge read out from the pixel prior to a new image exposure;
• III) operating and exposing the photoconductor layer of the array to imaging radiation;
• IV) obtaining and storing for each pixel exposure data read out from the detection panel, representing an image charge due to the image exposure;
• VII) operating the array at least one more time without exposing to imaging radiation and obtaining and storing in said memory post-exposure data representing post-exposure charge read out from the detection panel for each pixel immediately following the new image exposure;
• VIII) obtaining a correction signal for each pixel by averaging for each pixel the pre- and post-exposure data corresponding to each pixel;
• IX) subtracting the correction data corresponding to each pixel from the exposure data to obtain a pixel by pixel corrected new image exposure data which is substantially free from residual image information.