Patent ID: 7518118

Claim:
A method for measuring interaction depth of photons in CdZnTe pixel detectors comprising: providing a CdZnTe pixel detector; connecting a side of the CdZnTe pixel detector to an application specific integrated circuit (ASIC); configuring the ASIC for measuring both positive polarity and negative polarity signal amplitudes; applying a bias on the CdZnTe pixel detector such that a segmented contact of the CdZnTe pixel detector collects electrons; upon interactions of photons in the CdZnTe pixel detector, measuring, through the ASIC, a core pixel having positive signal amplitude and hallow pixels having negative signal amplitude and surrounding the core pixel; and calculating a ratio of a sum of the positive signal amplitudes of the hallow pixels to the negative signal amplitude of the core pixel, thus measuring the interaction depth of the photons.