G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 23/04 (2006.01) A61B 6/00 (2006.01) G06T 11/00 (2006.01)
Patent
CA 2048782
15CT03549 ABSTRACT An x-ray CT system has a detector which revolves about the object being imaged to acquire attenuation data from many different angles through a range of at least 180°. The response of the detector has a time lag which as the detector revolves tends to blur the attenuation data. The acquired data is compensated for the resolution degradation by convolving the data with a function that is the inverse of a response function of the detector. An image can be reconstructed from this compensated data. However, this compensation process tends to reintroduce noise that was reduced by the blurring. As a result, a modified version of the detector response function is applied to the compensated data to reduce the noise without degrading the image resolution to an unacceptable level.
Crawford Carl Ross
King Kevin Franklin
Company General Electric
Craig Wilson And Company
LandOfFree
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