Posted on Aug 02, 2016 | Comments (0)
When performing Computed Tomography, a common artifact that frequently pops its ugly head is a ring artifact. A new Hardware/Software solution from NSI nearly eliminates ring artifacts completely while bringing other benefits to the acquisition process.
During a CT scan, pixels that do not respond to the variations in product related attenuation will cause consistent or intermittent tracks along scan trajectories which end up as rings in a CT reconstruction.
Another contributor to this artifact is product position. The area of a part that lands directly on the center of the rotational axis has no real perspective change during rotation. A ring artifact is also very commonly present in this area especially if the image has a lower signal to noise ratio in that area.
Single DR Image from CT Scan
Ring Artifact within CT Slice
2 Comparison Scans were performed with and without the newly developed ring reduction technology. The scans were performed using severe ring artifact causing parameters.
1” Aluminum Rod
Worst Case Ring Artifact Scan Conditions
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