摘要:
A system for eliminating image artifacts caused by electromagnetic interference (EMI) on a portable digital x-ray detector that is capable of non-contact wireless inductively coupled power transfer and capacitively coupled communication and data transfer. An X-ray imaging system comprising a portable digital X-ray detector inductively and capacitively coupled to a power source and communication device that is coupled to a detector receptacle of the X-ray imaging system when the portable digital X-ray detector is located within the detector receptacle to transfer power from a power supply of the power source and communication device to the portable digital X-ray detector and transfer communication and data between the power source and communication device and the portable digital X-ray detector.
摘要:
A digital X-ray detector includes a pixel array that includes multiple pixels arranged in rows and columns, wherein each pixel includes a photodiode and a transistor. The digital X-ray detector also includes a scan line coupled to each pixel in a first dimension, a data line coupled to each pixel in a second dimension, enable circuitry coupled to the transistor of each pixel for enabling readout of the photodiode, and readout circuitry coupled to the photodiode through the transistor of each pixel for reading out data from the photodiode. The digital X-ray detector is configured to autonomously determine a start of an X-ray exposure while the enable circuitry maintains each transistor in an off state.
摘要:
A system for reading data is provided. The system includes a detector having an array of first semiconductor devices, an array of second semiconductor devices, and an array of photodiodes. The array of photodiodes is coupled to the array of first semiconductor devices and the array of second semiconductor devices.
摘要:
Systems, methods and apparatus are provided through which in some embodiments field-effect-transistor (FET) leakage is estimated recursively from a pixel value obtained when the FET is off. The corrected pixel value is then obtained by subtracting the FET leakage estimate from the pixel value read when the FET is on. A weighing factor is introduced for the FET leakage estimation to achieve the balance between image noise and correction resolution.
摘要:
A system and method for collecting x-ray exposure data in an x-ray detector include scanning pixels in an x-ray detector to determine exposure levels. The scanning may progress sequentially from a first edge to an opposite edge or may progress in an alternating fashion across the detector. The detector may include a data line split, where an object may be positioned between the data line split and an x-ray source. The scanning may then progress sequentially from at least one detector edge towards the data line split. In addition, a system for collecting x-ray exposure data in an x-ray detector is described. The system includes a detector, a plurality of data lines and scan lines, and a programmable logic device. The programmable logic device communicates at least one of a scan line driver module direction signal, an enable scan line driver module signal, and a cascade signal.
摘要:
A method and apparatus for correcting the offset induced by Field Effect Transistor (FET) photo-conductive effects in solid state x-ray detectors includes dedicating rows at the beginning and end of an x-ray detector scan. The dedicated rows may be used to measure the “signal” induced by the photo-conductivity of FET switches in solid state x-ray detectors. Since the signal induced by FET photo-conductivity decays over time, the measurements taken at the beginning and end of a detector scan may be used to predict by interpolation the amount of signal contributed by photo-conductive induced offset for each row of the detector scan on a column by column basis.
摘要:
A digital detector of a digital imaging system is provided. In one embodiment, the digital detector includes a flat-panel detector having a detector array for converting X-ray radiation into image data. The digital detector may also include a plurality of antennas, and the digital detector may be configured to transmit the image data via one or more antennas of the plurality of antennas. Additional systems, methods, and devices are also disclosed.
摘要:
Systems, methods and apparatus are provided through which in some embodiments a non-volatile storage medium is or can be operably coupled to a medical image acquisition device to reduce the risk of loss of medical image data.
摘要:
A pixel sensing subsystem for a solid state image sensor includes frame timing logic that produces a frame timing signal indicative of an end-of-frame time and a beginning-of-frame time and reset logic that produces a reset signal for a charge accumulator of pixel sensing electronics. The reset logic asserts the reset signal at least once between the end-of-frame time and the beginning-of-frame time to prevent saturation of the pixel sensing element.
摘要:
Systems, methods and apparatus are provided through which in some embodiments, row-correlated noise of a digital X-ray detector is monitored during idle operation of the digital X-ray detector and the magnitude of the row-correlated noise is compared to a visible threshold.