Data acquisition system for medical imaging
AssigneeGeneral Electric Company
InventorsNaresh Rao, Jianjun Guo
Life of this patent
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Abstract
A system and a method for converting an analog signal to a digital signal are provided. The technique involves receiving a sampled analog signal, and selecting one of a plurality of segments of a segmented relation between DAC output values and desired ADC input values. Desired gain and offset values are applied to the DAC output values or to the sampled analog signal based upon the selected segment. The sampled analog signal is converted to a digital signal based upon the desired gain and offset values.
Claims29
A method for converting an analog signal to a digital signal, comprising:
- receiving a sampled analog signal;
- selecting one of a plurality of segments of a segmented relation between DAC output values and desired ADC input values;
- applying desired gain and offset values to the DAC output values or to the sampled analog signal based upon the selected segment;
- and
- converting the sampled analog signal to a digital signal based upon the desired gain and offset values.
(canceled)
A method for digitizing a scanned X-ray signal, comprising:
- receiving a sampled analog signal representative of charge from a pixel on a digital X-ray panel;
- selecting one of a plurality of segments of a segmented relation between DAC output values and desired ADC input values;
- applying desired gain and offset values to the DAC output values and to the sampled analog signal based upon the selected segment;
- and
- converting the sampled analog signal to a digital signal based upon the desired gain and offset values.
An analog to digital converter configured to provide a digital output signal representative of an analog input signal, comprising:
- a plurality of ADC channels, each of the plurality of ADC channels comprising:
- an analog front-end operable to pre-condition the analog input signal;
- and
- a gain and offset selector operable to provide a segment data and create one of a plurality of segments from a base ramp based on the segment data;
- and
- a DAC operable to provide a DAC output signal based on the base ramp and the segment data, wherein the analog input signal is compared with the DAC output signal in a selected segment of the DAC output signal for providing the digital output signal.
(canceled)
(canceled)
-29. (canceled)
A data acquisition system for a digital X-ray panel, comprising:
- a plurality of pixels, wherein each of the plurality of pixels is configured to store a charge;
- a plurality of ADC channels, wherein each of the plurality of ADC channels is coupled to each of the plurality of pixels and each of the plurality of ADC channels comprises:
- an analog front-end operable to pre-condition an analog input signal representative of the charge stored on each of the plurality of pixels;
- and
- a gain and offset selector operable to provide a segment data and create one of a plurality of segments from a base ramp based on the segment data;
- and
- a DAC operable to provide DAC output signal based on the base ramp and the segment data, wherein the analog input signal is compared with the DAC output signal in a selected segment of the DAC output signal for providing the digital output signal.
(canceled)
Dependencies are inferred from the claim text.