摘要:
In a method and an apparatus for producing X-ray tomograms of the jaw and skull of a patient, a detector arrangement having at least one x-ray detector is provided. The radiation-sensitive area of the detector is a sub-area of the total detector area required for the subject exposure. The image exposure ensues in a number of chronologically separate sections in which, following a first sub-exposure, the detector arrangement is displaced along the longitudinal axis and/or the transverse axis of the detector surface and the diaphragm aperture of the primary diaphragm associated with the x-ray source is simultaneously correspondingly adapted so that the position of the x-ray beam is shifted so that it still strikes the detector appropriately after the detector is displaced.
摘要:
Automatic triggering of an intraoral x-ray sensor used in a dental x-ray imaging system. The intraoral sensor has an array of pixels. The array of pixels has a plurality of lines of pixels, and each of the pixels generates an electrical signal correlated to x-ray radiation that impinges that pixel. An electronic control unit is connected to the intraoral sensor to receive electric signals from the array of pixels. The electronic control unit destructively reads pixel clusters in one or more of the plurality of lines of pixels. The electronic control unit is configured to generate a dose-correlated signal based on the signals from each of the pixel clusters in each of the one or more lines of pixels and initiate capture of an image generated with information from each of the pixels in the array of pixels, when the combined signal exceeds a predetermined threshold.
摘要:
Automatic triggering of an intraoral x-ray sensor used in a dental x-ray imaging system. The intraoral sensor has an array of pixels. The array of pixels has a plurality of lines of pixels, and each of the pixels generates an electrical signal correlated to x-ray radiation that impinges that pixel. An electronic control unit is connected to the intraoral sensor to receive electric signals from the array of pixels. The electronic control unit destructively reads pixel clusters in one or more of the plurality of lines of pixels, each of the pixel clusters located at a perimeter of the array of pixels. The electronic control unit is configured to generate a dose-correlated signal based on the signals from each of the pixel clusters in each of the one or more lines of pixels and initiate capture of an image generated with information from each of the pixels in the array of pixels, when the combined signal exceeds a predetermined threshold.
摘要:
An X-ray apparatus, in particular a dental X-ray apparatus, includes an X-ray radiation source for generating X-ray radiation to be directed at an object to be investigated, for example, a patient's tooth or jaw. The apparatus has an optical device through which an aiming device, for example, an additional visible pilot radiation generated by a further light source, is directed substantially parallel to the X-ray radiation at the object to be investigated to facilitate the positioning of the X-ray head.
摘要:
An X-ray image sensor, comprising an X-ray converter layer for converting X-rays into signals received by a semiconductor detector for sampling and detecting converted X-rays as electrical signals, and a connection substrate comprising electrical connections, the X-ray converter layer bonded to a first surface of the semiconductor detector and the connection substrate arranged at a second surface of the semiconductor detector, opposite the X-ray converter layer, wherein the semiconductor detector in at least one edge portion comprises vias for through-contacting detector elements formed in or on the first surface of the semiconductor detector to the connections substrate.
摘要:
A digital X-ray image sensor device comprising a fibre-optic scintillating layer for converting X-rays into optical radiation and a photoelectric conversion layer for converting the optical radiation into electrical signals, the photoelectric conversion layer comprising an array of CMOS sensor elements, wherein each of the sensor elements has a composite exposure response characteristic comprising a low exposure region characterized by a first gain and a high exposure region characterized by a second gain, wherein the first gain is higher than the second gain.
摘要:
An intraoral x-ray sensor with embedded standard computer interface. The sensor includes a data transfer cable with improved mechanical strength and heat transferring properties. The cable is quad-twisted USB cable and includes two data lines, a ground line, and fillers twisted within a metallic sheath, e.g., a metal braided shield. The cable is symmetrically organized about a centerline. The symmetric cable has an improved life due to the ability to withstand mechanical stress (e.g., rotational stress). The sensor includes a processor and a housing with an inner metallization layer. The sheath is coupled to the inner metallization layer to transfer heat generated by the processor from the inner metallization layer to the sheath.
摘要:
A system and method for automatic detection of x-rays at an x-ray sensor. A source emits x-ray radiation towards an x-ray sensor, and the x-ray sensor automatically detects the x-ray radiation. The x-ray sensor automatically detects x-ray radiation by evaluating a time series and determining that a voltage threshold is crossed a certain amount of time earlier than the average time it takes the voltage threshold to be crossed from dark current and other noise.
摘要:
A system and method for automatic detection of x-rays at an x-ray sensor. A source emits x-ray radiation towards an x-ray sensor, and the x-ray sensor automatically detects the x-ray radiation. The x-ray sensor automatically detects x-ray radiation by evaluating a time series and determining that a voltage threshold is crossed a certain amount of time earlier than the average time it takes the voltage threshold to be crossed from dark current and other noise.