What characteristic defines hyperechoic areas in ultrasound imaging?

Hyperechoic areas in ultrasound imaging are characterized by their ability to generate high-intensity echoes. This property arises because hyperechoic tissues reflect ultrasound waves more effectively than surrounding tissues. As a result, these areas appear brighter on the ultrasound image, which is why they are termed "hyperechoic."

In contrast, darker gray images are typically associated with hypoechoic areas, which reflect fewer echoes, thus appearing less bright. Similarly, areas that generate little or no echoes would either be anechoic or produce lower echo intensities, which are not characteristic of hyperechoic tissues. Therefore, the defining feature of hyperechoic areas is their capability to create strong echoes, leading to their bright appearance on ultrasound.