X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Reexamination Certificate
2007-09-28
2010-12-28
Glick, Edward J (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
Reexamination Certificate
active
07860208
ABSTRACT:
In a method for correction of scatter radiation errors in radiography and computer tomography, using flat panel detectors, initially an estimation of a scatter radiation distribution Scor(y,z) is undertaken, and a standard correction term δpcoris subsequently calculated. Noise filtering of the standard correction term δpcorwith F(δpcor) is implemented and subsequently the noise-filtered standard correction term F(δpcor) is added to the logarithmized measured total projection data ps. The noise filtering can be implemented adaptively dependent on a previously-determined local noise variance. The method can be implemented in a radiography system and/or by a computer for generation and/or processing of projective and/or tomographic exposures, with a memory containing program codes causing the computer in operation to execute the steps of the method.
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Haerer Wolfgang
Ruehrnschopf Ernst-Peter
Corbett John M
Glick Edward J
Schiff & Hardin LLP
Siemens Aktiengesellschaft
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