Patent ID: 8754376
Filing Date: 2014-06-17
Classification: A61B

Abstract:
1. A PET-MR dual modality nuclear medicine imaging system comprising: an MRI gradient coil; one or more detectors that receive gamma photons; one or more analog-to-digital converters (ADCs) that are coupled to the one or more detectors, wherein the one or more ADCs receive analog electrical signals from the one or more detectors corresponding to the received gamma photons and convert the analog electrical signals to digital signals by taking multiple succeeding samples of the analog electrical signals from the respective one or more ADCs; one or more baseline calculation devices for determining a zero baseline value of a channel from the one or more detectors to allow for correction of noise or interference on the detectors, the one or more baseline calculation devices configured for receiving the multiple succeeding samples of the analog electrical signals from the respective one or more ADCs, wherein the one or more baseline calculation devices track a baseline of the digital signals from the respective ADCs for slow changes in the baseline, wherein the slow changes mean a rate of change less than or equal to 3 ADC least significant bit per micro second, wherein the slow changes occur when the MRI gradient coil is not being driven, wherein the one or more baseline calculation devices perform the following for the slow changes in the baseline: a processing device for receiving and processing the digital signals based on the adjusted baseline to facilitate generating an image data.