Patent ID: 6936822
Filing Date: 2005-08-30
Classification: A61B,G01T

Abstract:
1. An apparatus operable with a gamma camera to detect position and energy information without pile-up, comprising: first, second and third delay circuits configured to receive first, second, and third incoming signals from the gamma camera and to output the signals after first, second, and third time delays; a trigger and timing circuit configured to receive the third incoming signal to detect an event and measure the time difference between two continuous events; first, second and third computation circuits configured to receive the signals and to determine a weighted value for each of the signals; and a digital signal processor connected to receive the weighted values and to subtract residual signal values corresponding to residual weighted values of previous ones of said first, second, and third incoming signals; wherein the digital signal processor provides an output signal corresponding to a position value of the first and second incoming signals and an energy value of the third incoming signal.