What imaging challenge does cupping artifact present in CT scans?

Cupping artifact in CT scans primarily results in an inaccurate representation of density differences. This artifact appears as a decrease in attenuation values at the center of the scanned object compared to its periphery. As a result, it can distort the appearance of structures within the scanned area, potentially leading to misinterpretation of the images. This can be particularly concerning in assessing lesions or anatomical features since the perceived density differences might not accurately reflect the actual tissue characteristics. Understanding this artifact is crucial for radiologists and technologists to minimize its impact during scanning and improve image quality.

While ring artifacts and streaks can occur in CT imaging, they are not typically associated with cupping. Cupping specifically alters density perception rather than elongation of structures or simply creating visual disturbances such as streaks or rings.