Computed Tomography Technologist Practice Exam

Question: 1 / 615

What is the consequence of imperfect detector elements in CT scans?

Blurry images

Ring artifacts

Imperfect detector elements in CT scans can result in ring artifacts, which manifest as visible, circular patterns in the images. These artifacts occur when one or more detector elements fail to perform optimally, leading to variations in the data collected across the scanning plane. When reconstruction algorithms process this inconsistent data, they can create the appearance of rings around structures in the scanned image. Such artifacts can significantly affect image quality, making it difficult for radiologists to interpret the results accurately.

While other consequences like blurry images can arise from various factors affecting image resolution and reconstruction, ring artifacts specifically stem from the imperfections in the detector array itself. Increased scanning speed or increased radiation dosage do not directly relate to the performance of the detector elements, making them less relevant in this context.

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Decreased scanning speed

Increased radiation dosage

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