Patent ID: 8119980
Filing Date: 2012-02-21
Classification: G01T

Abstract:
1. A method for tuning a nuclear imaging system having a plurality of nuclear radiation sensors, comprising: a) exposing the sensors to nuclear radiation of known energy and location of origin; b) using individual sensor responses to said nuclear radiation, determining sensor gain changes required to adjust the system sensors toward a previously determined tuned state; c) using the sensor gain changes determined in step b), determining sensor gain control values required to produce desired gain changes; d) modifying the sensor gain control values in accordance with the sensor gain control values determined in step c); and e) repeating steps a) through d) until the previously determined tuned state is achieved, wherein said sensor gain changes determined in step b) are modified in subsequent iterations of said steps based on an excessive gain factor Xgf=(ΔG/G) wherein (ΔG/G) wherein said sensors comprise photomultiplier tubes, said gain control values comprise DAC values, and updated DAC values DAC