Semiconductor gamma-ray camera and medical imaging system

G - Physics – 01 – T

Patent

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Details

G01T 1/24 (2006.01) A61B 6/03 (2006.01) G01T 1/00 (2006.01) G01T 1/161 (2006.01) G01T 1/164 (2006.01) G01T 1/20 (2006.01) G01T 1/29 (2006.01) G01T 1/36 (2006.01) G03B 42/00 (2006.01) H01L 25/03 (2006.01) H01L 27/14 (2006.01) H01L 27/146 (2006.01) H01L 31/0296 (2006.01) H04N 5/32 (2006.01)

Patent

CA 2208576

An imaging system including an imaging head, a signal processor, a data acquisition system, and an image processing computer is disclosed. The imaging head includes a detector and an aperture for directing the radiation to the detector. The detector comprises a plurality of closely-packed detection modules (206) comprising a plurality of detection elements (212) mounted to a circuit carrier (214) which includes channels for conditioning and preprocessing the electrical pulses produced when a detection element absorbs radiation. The amplitude of the pulse is indicative of the magnitude of the radiation absorbed. The detection modules employ a fall-through circuit to automatically find valid events, i.e., only those detection elements having a stored amplitude exceeding a predetermined threshold.

Système d'imagerie comprenant une tête de prise d'image, un processeur de signaux, un système d'acquisition de données et un ordinateur de traitement d'image. La tête de prise d'image comprend un détecteur et une ouverture servant à diriger le rayonnement vers le détecteur. Ce dernier comprend une pluralité de modules de détection serrés les uns contre les autres (206) et composés d'une pluralité d'éléments de détection (212) montés sur un support de circuit (214) comportant des canaux servant à effectuer le conditionnement et le traitement préalable des impulsions électriques qui se produisent quand un élément de détection absorbe le rayonnement. L'amplitude de l'impulsion indique l'intensité du rayonnement absorbé. Le module de détection utilise un circuit de repérage permettant de repérer automatiquement les événements corrects, c'est à dire les éléments de détection dont l'amplitude mémorisée dépasse un seuil prédéterminé.

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