RTBC Digital Radiography Assessment Practice Test

A high Detective Quantum Efficiency (DQE) indicates that a digital radiography system is effective at capturing and processing the signal from the incoming radiation while minimizing noise. This contributes to better image quality. The DQE is a measure of how efficiently a system converts the incoming X-ray photons into a useful image.

When a radiograph displays a high DQE, it is characterized by high signal and low noise. High signal refers to a strong, clear representation of the anatomical structures being imaged, allowing for better visibility and diagnostic utility. Low noise signifies that there is minimal interference from random variations in the signal, leading to a cleaner and more interpretable image. In this context, the combination of high signal and low noise is what allows for a clearer, more precise diagnostic radiograph, making it the correct answer.

In contrast, scenarios with low signal might indicate that the image does not adequately capture critical detail, and high noise levels may further obfuscate the important information needed for effective diagnosis. Therefore, highlighting the importance of high DQE in achieving optimal radiographic results.