System and method of notch filtration for dual energy ct
AssigneeGeneral Electric Company
InventorsNaveen Chandra, Bruno Kristiaan Bernard De Man
Life of this patent
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Abstract
An imaging system includes an x-ray source that emits a beam of x-rays toward an object to be imaged, a detector that receives the x-rays attenuated by the object, a spectral notch filter positioned between the x-ray source and the object, a data acquisition system (DAS) operably connected to the detector, and a computer operably connected to the DAS and programmed to acquire a first image dataset at a first kVp, acquire a second image dataset at a second kVp that is greater than the first kVp, and generate an image of the object using the first image dataset and the second image dataset.
Claims22
An imaging system comprising:
- an x-ray source that emits a beam of x-rays toward an object to be imaged;
- a detector that receives the x-rays attenuated by the object;
- a spectral notch filter positioned between the x-ray source and the object;
- a data acquisition system (DAS) operably connected to the detector;
- and
- a computer operably connected to the DAS and programmed to:
- acquire a first image dataset at a first kVp;
- acquire a second image dataset at a second kVp that is greater than the first kVp;
- and
- generate an image of the object using the first image dataset and the second image dataset.
A method of dual energy CT imaging comprising:
- selecting a low kVp potential and a high kVp potential for dual energy imaging;
- selecting a k-edge filter based on the low kVp potential and the high kVp potential and based on a k-edge of a material in the k-edge filter;
- positioning the k-edge filter between a source and an object to be imaged;
- and
- acquiring imaging data with the source energized to the first kVp potential and with the source energized to the second kVp potential.
A method of dual energy CT imaging comprising:
- passing low kVp x-rays through a k-edge notch filter to generate a first x-ray spectrum;
- acquiring a first set of imaging data of an object using the first x-ray spectrum;
- passing high kVp x-rays through the k-edge notch filter to generate a second x-ray spectrum;
- acquiring a second set of imaging data of the object using the second x-ray spectrum;
- and
- generating an image using the first set of imaging data and the second set of imaging data.
Dependencies are inferred from the claim text.