Teledyne E2v Semiconductors Sas

Teledyne E2v Semiconductor Sas

Nathalie Pascal

David Perennez

Florian Julien

Caroline Papaix

Stéphane Crespin

An intra-oral dental radiological image sensor is mechanically reinforced by two front Rand rear Rmechanical reinforcing plates each inserted between a respective face of an image capture module and a respective frontA and rearB shell bottom of a casing. The front reinforcing plate is a solid plate, made of material transparent to X rays, covering the photosensitive front face (scintillator) of the module, and harder than the front shell. The rear plate, less thick than the front plate, is harder than the rear shell and comprises an opening O provided to surround, without covering them, components present on the rear face of the module, under a rear shell dome.

Dental intraoral radiological image sensor

Digital dental X-ray

The invention relates to medical imaging and, more specifically, to intraoral dental radiology. The sensor according to the invention includes a series (SPHx) of detection photodiodes for detecting the arrival of an X-ray flash. The series of photodiodes occupies the location of a central column of the matrix of pixels. The signal of the missing pixel in each row can be reconstructed by interpolating the signals provided by the adjacent pixels of the row. The detection photodiodes are identical to the photodiodes of the active CMOS pixels. They are all electrically connected on one side to a reference potential and on the other side to a detection conductor (CD) extending along the series of photodiodes. This detection conductor is connected to a detection circuit (DX) delivering a signal for triggering the capture of an image when the detected current or the variation in this current exceeds a threshold showing that an X-ray flash has been initiated.

Radiation sensor with X-ray detection

Growing community of inventors

Le Sappey-en-Chartreuse, France

Nathalie Pascal