A Study on the Prevention of Computed Tomography Artifacts

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Prevention of Computed Tomography Artifacts Computed tomography is a process by which a computer processor is able to digitally render a three-dimensional image. This technology has become mainstream in the medical field for a few decades. Millions of Computerized Tomography (CT) scans are performed in the United States annually. This technique allows medical professionals a more in-depth and precise idea of a patient's condition, and can subsequently offer further insight as to the appropriate treatments, as well as what kind of treatments may prove ineffective. Computerized tomography is a useful tool, yet it is not perfect. Unintended distortions or errors in CT scans are called artifacts. Artifacts are wholly unrelated to the patient's medical condition and may be consequence of several factors. The paper will describe how artifacts occur and propose steps by which artifacts in CT scans can be prevented or altogether avoided. Barrett and Keat offer a definition of artifacts, as well as explain the most common types of artifacts: "In computed tomography (CT), the term artifact is applied to any systematic discrepancy between the CT numbers in the reconstructed image and the true attenuation coefficients of the object. CT images are inherently more prone to artifacts than conventional radiographs because the image is reconstructed from something on the order of a million independent detector measurements"¦ The types of artifact that can occur are as follows: (a)

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