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US 2022/0054102 A1Published application
C-arm imaging system and method
AssigneeGE Precision Healthcare LLC
InventorsJames Zhengshe Liu, Christopher Welsh
Life of this patent
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AssigneeGE Precision Healthcare LLC
InventorsJames Zhengshe Liu, Christopher Welsh
Estimating the term…
A system for imaging an object includes an X-ray source operative to transmit X-rays through the object and a detector to receive the X-ray energy of the X-rays after passing through the object and to generate corresponding object X-ray intensity. The system also includes a controller to measure a detector entrance dose with no object being placed on the X-ray beam path and determine a relationship between an X-ray tube electrical parameter and the detector entrance dose. The controller further determines a relationship between the X-ray tube electrical parameter, the detector entrance dose and a detector average pixel intensity and obtains a normalized air map as a function of the X-ray tube electrical parameter based on calibration image data. The controller also generates an air map based on the normalized air map, the detector entrance dose and the detector average pixel intensity and reconstructs an image of the object based on the air map and the measured object X-ray intensity.
A system for imaging an object comprising:
A method for imaging an object comprising:
The method of claim 13, wherein the X-ray tube electrical parameter comprises a tube voltage, a tube current or combinations thereof.
The method of claim 13, wherein the detector entrance dose comprises a plurality of detector entrance dose values corresponding to a plurality of X-ray tube electrical parameter values.
The method of claim 13, wherein the detector average pixel intensity is divided by the detector entrance dose and a digital gain for determining the relationship between the X-ray tube electrical parameter, the detector entrance dose and the detector average pixel intensity.
The method of claim 13, wherein obtaining the normalized air map comprises dividing the calibration image data with the detector average pixel intensity.
The method of claim 13, wherein the calibration image data is obtained by adjusting the X-ray tube electrical parameter such that the calibration image data pixel values are around the middle of the dynamic range of the detector.
The method of claim 13, wherein the generating the air map is based on the following equation:
Dependencies are inferred from the claim text.