Commissariat a L'energie Atomique

Claude Janin

Alain Chapuis

Corinne Mestais

Michel Tararine

Edmond Tournier

Alain Noca

A device for collection, digital encoding, and processing of signals from plural photo-detectors in a camera. The device includes plural digital encoding units, each digital encoding unit in the plural encoding units being associated with one individual photo-detector in the plural photo-detectors, and including a summation device and an analog-digital converter. A digital processing unit is connected to each encoding unit. Such a device may find particular application to gamma-cameras.

Device and method for collecting and encoding signals coming from photodetectors

Device and method for nuclear locating by iterative computing of barycenter, and application to gamma-cameras

Device and process for nuclear location by weighted barycenter calculation using parallel-operating detectors, and application to gamma cameras

Method and apparatus for determining a position of an event. The system processes signals from an assembly of N photodetectors and includes a signal generator for producing a signal representing the value of the maximum, or the energy, of a pulse delivered by the photodetector and is digitized. It also includes a signal generator for producing a threshold-exceeded signal for each photodetector when the amplitude of the signal representing the value of the maximum, or the energy, of the digitized pulse is greater than the threshold. It also includes a signal generator common to the photodetectors, for delivering a signal representing a position of an event as a function of the threshold-exceed signals. This device can be used with gamma cameras.

Device and method for determining the assumed position of a phenomenon relative to a set of photodetectors, and application to gamma-cameras

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Grenoble, France

Claude Janin