8 May 1995 Preliminary characterizations of a new hybrid CdTe structure for x-ray dental imaging
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Abstract
A new 2D imaging system structure is being studied in CEA-LETI for medical and industrial applications, beginning with dental applications. It consists of a bulk CdTe:Cl detection medium connected to a 2D electronic read-out circuit using the indium bumps techniques developed for infrared imaging. The feasibility of such a structure was tested first with 64 X 64 pixels, 100 micrometers pitch. The 900 micrometers thick CdTe sample suits well for x rays up to 100 keV. High absorption efficiency and high spatial resolution can be reached together by using this new x-ray detector. Due to the fact that the electric field channelizes the created charges, unlike structures using scintillators, this new structure requires no compromise in defining the thickness of the x-ray detector medium. Characterization was performed with 70 kV x rays from a standard dental x ray source. The performances (linearity, signal-to-noise ratio, spatial resolution) and the images obtained with the first prototypes confirm the advantages of such detectors. Based on these results, a 20 X 30 mm2 imager for dental applications is now being developed by SOFRADIR and CEA- LETI.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Francis Glasser, Marc Cuzin, Olivier C. Peyret, Francois Mongellaz, Philippe Rambaud, Michel Ravetto, Bernard Pitault, Andre Salaville, Sylvain Paltrier, "Preliminary characterizations of a new hybrid CdTe structure for x-ray dental imaging", Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995); doi: 10.1117/12.208364; https://doi.org/10.1117/12.208364
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