Indirect x-ray image detector for radiology

G - Physics – 01 – T

Patent

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Details

G01T 1/208 (2006.01) A61B 6/00 (2006.01) G01T 1/202 (2006.01) H01L 29/18 (2006.01) H01L 31/0272 (2006.01)

Patent

CA 2241779

An x-ray image detector suitable for radiology has an active matrix substrate with scanning and read-out circuits. Over this active matrix substrate, which can be a two dimensional array of TFTs associated with a storage capacitance, there is deposited a photoreceptor made of a thin layer of amorphous selenium based multilayer structure. The photoreceptor is covered with a light-transparent electrode on top of which there is provided a scintillator. The indices of refraction of the scintillator and of the selenium based multilayer may be matched with the use of the biasing electrode.

L'invention concerne un détecteur d'image radiologique indirecte pour utilisation avec la radiologie. Ledit détecteur comprend un substrat matriciel actif avec des circuits de balayage et de lecture. Sur ce substrat matriciel actif, qui peut être un réseau bidimensionnel de TFT associés à une capacité de stockage, on trouve un photorécepteur composé d'une fine couche de pellicule complexe à base de sélénium amorphe. Le photorécepteur est couvert d'une électrode transparente à la lumière, au-dessus de laquelle se trouve un scintillateur. Les indices de réfraction du scintillateur et de la pellicule complexe à base de sélénium peuvent être mis en correspondance avec l'utilisation de l'électrode de polarisation.

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