Filter for data processing

Details Filter for data processing Filter for data processing

G - Physics

06

T

358/11.1, 358/11

G06T 11/00 (2006.01) G06T 5/00 (2006.01)

Patent

CA 1233916

Improved Filter for Data Processing Abstract An imaging method and apparatus having a new and improved data filter. In one application of the inven- tion computed tomography number inaccuracies are avoided by use of a new filter function derived from discrete points of a truncated spatial domain convolution filter. The points from the truncated convolution filter are fourier transformed to yield a ramp filter with ripple in the spatial frequency domain. Data from a CT scan is filtered with this new filter function and back projected to produce images that do not exhibit CT number inaccuracies.

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