CT has all of the following advantages over conventional film radiography EXCEPT?

Computed Tomography (CT) offers numerous advantages compared to conventional film radiography, particularly in distinguishing different types of tissue. The assertion that differences in tissue density of less than 5% can be distinguished is not accurate. In practice, CT technology is typically capable of differentiating tissues based on smaller variations in physical density, often down to less than 1%. This allows for a more detailed and nuanced understanding of the anatomy and pathology present within the scanned area.

The other options highlight valid strengths of CT imaging. For instance, CT significantly reduces the problem of superimposed images, as it provides cross-sectional imaging that can focus on a specific area without the interference of structures outside the area of interest. Additionally, while conventional radiography may require a significant difference in tissue density (around 10%) to make a distinction, CT can detect much smaller differences, thereby enhancing diagnostic capabilities.

Overall, the ability of CT to refine image quality and detect subtle differences in tissue density reinforces its position as a superior imaging modality in many clinical scenarios. This capability is particularly important in fields such as dentistry and medicine where precise diagnosis is critical.