Apparatus and method for reading data from an image detector

摘要

An image detector (e.g. for X-ray images) includes an array of photodetectors (40,42,44) arranged in n rows and m columns with at least a portion of the photodetectors in each column being selectively connected to a common column output signal line (48<-><1> - 48-m by a selector means. the image information is read out of the photodetectors by sequentially selecting groups of rows starting with a row near the middle of the array and then sequentially selecting other groups of rows on alternate sides of the array middle. As image data is read out of the photodetectors (40) in the selected row group, groups of column output lines (48) are coupled together to provide a combined output signal. This readout technique provides a reduction in the image data and reduces the likelihood of signal degradation for the central portion of the image.