Gain correction for a CT system

Details Gain correction for a CT system Gain correction for a CT system

2007-09-07

2010-06-08

Glick, Edward J (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

Reexamination Certificate

active

07734004

ABSTRACT:
A method for imaging unknown objects in a computed tomography (CT) system, comprising determining ray gain for a known object is provided. A CT reconstruction is performed with the known object to obtain reconstructed values. Ideal values are obtained for pixels of the known object. An error related to a difference between the reconstructed values and the ideal values is generated. A ray gain is estimated that reduces the error.

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Mazin et al., 2D simulations of an inverse-geometry volumentric CT system with multiple detector arrays, Medical Imaging, Proceedings of SPIE, vol. 5745, 2005, pp. 889-897.
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Baek et al., “Two-dimensional reconstruction algorithm of an inverse-geometry volumetric CT system”, Poster presented at the SPIE Conference in Feb. 2007.
Baek et al., “Two-dimensional reconstruction algorithm of an inverse-geometry volumetric CT system”, Proceedings of SPIE Medical Imaging 2007: Physics of Medical Imaging, vol. 6510, 9 pages, Mar. 2007.

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