Apparatus and method for pile-up correction in photon-counting detector

A method, comprising:

• receiving an input signal associated with a first event and a second event in a photon-counting semiconductor detector;
• generating, by a relatively slow charge collection shaping amplifier based on the input signal, an indication of a total amount of energy associated with the first event and the second event;
• and
• allocating, in accordance with information from a relatively fast charge collection shaping amplifier based on the input signal, a first portion of the total amount of energy to the first event and a second portion of the total amount of energy to the second event.

An imaging system, comprising:

• an X-ray source configured to transmit X-rays toward an object;
• a photon-counting semiconductor detector configured to detect the X-rays traversing the object and to generate a detector signal associated with a first event and a second event;
• a charge sensitive amplifier configured to receive the detector signal and generate an output signal based on the detector signal;
• a relatively slow charge collection shaping amplifier configured to receive the output signal from the charge sensitive amplifier and to output an indication of a total amount of energy associated with a combination of the first event and the second event;
• and
• a relatively fast charge collection shaping amplifier configured to receive the output signal from the charge sensitive amplifier and to output an indication that is used to allocate a first portion of the total amount of energy to the first event and a second portion of the total amount of energy to the second event.