Trigger proccssor of the PET based on photosensitive wire chamber

The design and realization of the trigger processor of the PET based on photosensitive wire chamber are reported in this article. Except for the function of event judgement, it also measures the count loss of the whole system, detects the random coincidence, dose calibration and so on. We have successfully used the technique of EPLD and pipeline to fulfill the high performance of the processor.