Tomographic calibration apparatus
AssigneeShell Oil Company
InventorsHarold J. Vinegar, Scott L. Wellington
Life of this patent
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Abstract
An apparatus for providing data for the calibration of the atomic number and density of a test material being scanned in the radiation field of a computerized axial tomographic scanner (CAT). The apparatus comprises a housing which is adapted to be positioned in the X-ray field of the CAT in a predetermined position. The housing has an aperture that is adapted to accommodate the test material, and a plurality of calibration materials which have known atomic numbers and densities are positioned in the housing. In addition, the present invention provides a calibration apparatus that has a surface that is adapted to accommodate the test material.
Claims19
An apparatus for providing data for the calibration of the atomic number and density of a test material being scanned in the radiation field of a computerized axial tomographic scanner, said apparatus comprising:
- a housing adapted to be positioned in said radiation field in a predetermined position and having an aperture adapted to accommodate said test material;
- and a plurality of calibration materials having known atomic numbers and densities positioned in said housing.
An apparatus for providing data for the calibration of the atomic number and density of a test material being scanned in the radiation field of a computerized axial tomographic scanner (CAT), said apparatus comprising:
- a housing adapted to be positioned in said radiation field in a predetermined position adjacent said test material;
- and a plurality of calibration materials having known atomic numbers and densities positioned in said housing.
Dependencies are inferred from the claim text.