X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Reexamination Certificate
2011-02-15
2011-02-15
Glick, Edward J (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
Reexamination Certificate
active
07889833
ABSTRACT:
The present invention provides an X-ray tomography apparatus that reduces artifacts. The X-ray tomography apparatus includes scan device for exposing X rays to a subject to create projection data of the subject, CT value change specifying device for specifying the amount of change in CT value in a body-axis direction with respect to a target pixel of a tomographic image obtained by backprojecting the projection data, a first artifact determination unit for determining whether the amount of change in CT value is contained within a predetermined range in a peripheral decision pixel area containing the target pixel, a second artifact determination unit for determining that when the number of pixels contained in the predetermined range is found to be a first threshold value or more by a first artifact decision, the target pixel is as an artifact, and an artifact reduction unit for, when it is judged by the second artifact determination unit that the target pixel is as the artifact, performing image processing so as to reduce the artifact.
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Armstrong Teasdale LLP
Corbett John M
GE Medical Systems Global Technology Company LLC
Glick Edward J
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