X-ray or gamma ray systems or devices – Accessory – Testing or calibration
Reexamination Certificate
2006-08-08
2006-08-08
Glick, Edward J. (Department: 2882)
X-ray or gamma ray systems or devices
Accessory
Testing or calibration
C378S005000, C378S018000, C378S019000, C250S363090
Reexamination Certificate
active
07086780
ABSTRACT:
A method for calibrating a computed tomographic imaging apparatus having a gantry, a radiation source operable at a plurality of kVp's, and a detector array having a plurality of detector elements includes using a system detection function to estimate signals of each detector element that would have been detected through air and through a given thickness of water to determine estimated datasets. The estimated datasets are used to determine data pair sets each comprising a normalized water projection value and an ideal projection value for each detector element. The method further includes determining and storing a representation of a mapping function of the normalized water projections values to the ideal projection values in a memory of the computed tomographic imaging apparatus as a spectral calibration of the computed tomographic imaging apparatus.
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Bromberg Neil Barry
Kolker Alexander
Simoni Piero Ugo
Toth Thomas Louis
Wu Xiaoye
Armstrong Teasdale LLP
General Electric Company
Glick Edward J.
Horton Esq. Carl B.
Midkiff Anastasia
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