Patent ID: 6694172
Filing Date: 2004-02-17
Classification: A61B,G01T

Abstract:
A nuclear imaging apparatus comprising:a radiation detector including a plurality of rows of tiles of detector elements, each of the detector elements generating an output pulse in response to each detected radiation event; a rotor which rotates the radiation detector; an analyzer which compares the response of each detector element with preselected response criteria when the radiation detector is subjected to a calibration radiation source; read out electronics which suppresses output pulses from detector elements whose response fails to meet the preselected response criteria; a plurality of summing circuits, each summing circuit being connected with one of the plurality of rows of tiles of detector elements to generate a sum of the output pulses therefrom during a sampling period; a correction circuit which adjusts the sums with correction factors, each row having a preselected one of the correction factors after the output pulses from detector elements whose response fails to meet the preselected response criteria are suppressed; and a reconstruction processor that reconstructs an image representation from the adjusted sums and rotational position of the radiation detector corresponding to each sampling period.