Radiation imaging apparatus, radiation counting apparatus, and radiation imaging method

A radiation imaging apparatus, comprising:

• a radiation detector comprising a plurality of detector pixels for detecting radiation;
• an enemy measuring circuit for measuring energy when one of the detector pixels detects radiation on the basis of a signal output by the radiation detector;
• a plurality of counters for counting the number of detected radiations;
• a coincidence determination circuit for determining whether radiation has been coincidentally detected at other detector pixels adjacent to the one detector pixel upon detection of the radiation;
• a counter control circuit for controlling operation of incrementing one of the counters on the basis of the coincidence determination in the coincidence determination circuit and the energy in the energy measuring circuit;
• and
• a data processing device for performing image reconstruction using values of the counters,
• wherein the plurality of counters includes three counters including a counter for coincidence counting, a counter for non-coincidence counting with respect to the other adjacent detector pixels and a counter for counting regardless of coincidence or non-coincidence for each class of energy and performs image reconstruction on the basis of a count value of each of the counters.

A radiation imaging method in a radiation imaging apparatus comprising:

• a radiation detector comprising a plurality of detector pixels for detecting radiation;
• an energy measuring circuit for measuring energy when one of the detector pixels detects radiation on the basis of a signal output by the radiation detector;
• a plurality of counters for counting the number of detected radiations;
• a coincidence determination circuit for determining whether radiation has been coincidentally detected at other detector pixels adjacent to the detector pixel upon detection of the radiation;
• a counter control circuit for controlling operation of incrementing one of the counters;
• and
• a data processing device for performing image reconstruction using a value of the counter,
• wherein, on the basis of a result of coincidence determination in the coincidence determination circuit, the counter control circuit increments a count value of a counter for non-coincidence counting out of the plurality of counters when no coincidence is determined and increments a value of a count value of a counter for coincidence counting out of the plurality of counters when coincidence is determined.