Method and apparatus for correcting the offset induced by field effect transistor photo-conductive effects in a solid state X-ray detector

A detector subsystem for acquiring an image comprising:

• a panel being exposed to energy representative of an object and energy outside of said object, said panel formed of an array of cells detecting discrete amounts of energy;
• and
• a scanner for reading data sets, each of which is representative of an amount of energy stored by a cell;
• said scanner reading at least first and second data sets before and after said panel being exposed to said energy;
• one of said at least first and second data sets read from at least a portion of said object and one of said at least first and second data sets read from at least a portion of said outside of said object;
• said scanner producing a detector output based on a relation between the first and second data sets.

A medical diagnostic imaging system, comprising:

• a detector for detecting an energy pattern emanating from a patient;
• said detector having an array of discrete collecting elements storing charge representative of an amount of detected energy both from said patient and outside said patient;
• an image acquisition module scanning a charge stored on said collecting elements;
• and
• said image acquisition module scanning said collecting elements during a first pass to obtain data representative of the intrinsic energy characteristic from an unexposed detector and during a second pass to obtain both exposure data representative of an energy pattern from said patient and correction data representative of an energy pattern of said detector from outside said patient;