Abstract: A digital radiographic detector detects a first mode signal and dispositions a received digital image according to a procedure associated with the first mode signal. A second mode signal results in dispositioning a second received digital image according to a second image disposition procedure. The detector determines the first mode or second mode based on the signal's pulse width, a number and timing of rising edges (peaks), a digital code, a voltage level, or a combination thereof.

Abstract: A radiographic detector acquires a first partial exposed image signal during an image readout of each of the rows of photosensors, one row at a time. A first scan of each row includes measuring the charge delivered to each cell of the rows, including some rows having partial charge and other rows having full charge, and obtaining a first null image signal during the scan. A second scan includes measuring remaining charge delivered to those rows having partial charge. The null image signal data is subtracted from a sum of the first two scans.

Abstract: A digital radiographic detector detects a first mode signal and dispositions a received digital image according to a procedure associated with the first mode signal. A second mode signal results in dispositioning a second received digital image according to a second image disposition procedure. The detector determines the first mode or second mode based on the signal's pulse width, a number and timing of rising edges (peaks), a digital code, a voltage level, or a combination thereof.

Abstract: A radiographic detector acquires a first partial exposed image signal during an image readout of each of the rows of photosensors, one row at a time. A first scan of each row includes measuring the charge delivered to each cell of the rows, including some rows having partial charge and other rows having full charge, and obtaining a first null image signal during the scan. A second scan includes measuring remaining charge delivered to those rows having partial charge. The null image signal data is subtracted from a sum of the first two scans.

Abstract: A radiographic detector acquires a first partial exposed image signal during an image readout of each of the rows of photosensors, one row at a time. A first scan of each row includes measuring the charge delivered to each cell of the rows, including some rows having partial charge and other rows having full charge, and obtaining a first null image signal during the scan. A second scan includes measuring remaining charge delivered to those rows having partial charge. The null image signal data is subtracted from a sum of the first two scans.

Abstract: Embodiments of DR detector methods and/or apparatus for charge compensation can provide charge injection and/or at least one charge injection circuit that can temporally cancel charge injection to readout circuits resulting from positive (and/or negative) transitions of gate lines for pixel signal readout. In certain exemplary embodiments, DR detector imaging array methods and/or apparatus can provide variable charge injection levels (e.g., voltage or capacitance), variable Tau (e.g., resistance or capacitance), and/or multi-charge injection with staggered timing (e.g., using voltage and/or capacitance steps). In certain exemplary embodiments, DR detector imaging array methods and/or apparatus can provide charge injection compensation on ROIC on mask block basis. In exemplary embodiments, DR detector imaging array methods and/or apparatus can provide voltage reset off-set in readout circuits (e.g., ROICs).

Abstract: A radiographic detector acquires a first partial exposed image signal during an image readout of each of the rows of photosensors, one row at a time. A first scan of each row includes measuring the charge delivered to each cell of the rows, including some rows having partial charge and other rows having full charge, and obtaining a first null image signal during the scan. A second scan includes measuring remaining charge delivered to those rows having partial charge. The null image signal data is subtracted from a sum of the first two scans.

Abstract: Embodiments of radiographic imaging systems; radiography detectors and methods for using the same can include radiographic imaging array that can include a plurality of pixels that each include a photoelectric thin-film conversion element coupled to a conversion thin-film switching element. In certain exemplary embodiments, a radiographic imaging array can include a bias control circuit to provide a bias voltage to the photosensors for a portion of the imaging array, an address control circuit to control scan lines, where each of the scan lines is coupled to a plurality of pixels in the portion of the imaging array; and a signal sensing circuit connected to data lines, where each of the data lines is coupled to at least two pixels in the portion of the imaging array, where power of the bias control circuit, the address control circuit, and the signal sensing circuit is not removed simultaneously.

Abstract: A method for transferring data from a digital radiography receiver panel obtains, at the receiver panel, a full-sized set of image data that comprises a diagnostic image for a patient and at least one reference image for dark signal compensation. A wireless transmission channel between the receiver panel and a separate host processor is monitored to obtain a transmission performance measure. The obtained transmission performance measure is compared against a predetermined threshold value. The response to the comparison is either (a) processing at least some portion of the full-sized set of image data at the receiver panel to form a reduced-size set of image data, then wirelessly transmitting the reduced-size set of image data to the host processor; or (b) wirelessly transmitting the full-sized set of image data from the receiver panel to the host processor.

Abstract: A wireless, independent digital imaging sensor utilizes an external charge balance capacitor to establish a sense voltage at a common node between the charge capacitor and the pixel intrinsic capacitors in the sensor panel. A variable width pulse train responds to the sense voltage to control injection of charge to the external capacitor to maintain a constant voltage at the common equal to a reference voltage. An increase in pulse width above a threshold level representative of the onset of X-ray exposure is detected to generate an output control signal used to control subsequent image acquisition functions of the imaging sensor.

Abstract: A line clocking arrangement is used in a scanner for synchronizing the line readout of a clocked imaging device with the motion of an object being scanned. The line clocking arrangement includes an encoder for sensing movement of the object being scanned and generating a sync signal in correspondence with a movement of the object, and a timing generation circuit for generating clock signals for controlling the clocked imaging device. The clock signals include a drain clock signal for controlling the dumping of charge into an overflow drain and an output clock signal for clocking image charge through an horizontal output register. The timing generation circuit receives the sync signal and times the duration of the drain clock signal and the beginning of the output clock signal to the occurrence of the sync signal, whereby the line readout time is dynamically adjusted to changes in velocity of the scanned object during a period when charge is being dumped into the overflow drain.

Abstract: This abstract describes an apparatus for providing accurate white balance for images from a color sequential image scanner while minimizing the object illumination level. A shutter synchronized to the phase of a fluorescent light source allows for different exposure times for the red, green and blue image captures, in order to achieve proper white balance while maximizing the signal to noise ratio. By synchronizing the shutter with the AC voltage supplied to the illumination source, light level variations from one image capture to another are minimized.