How does a high-ratio grid compare to a low-ratio grid in terms of scattered radiation absorption?

A high-ratio grid is specifically designed to enhance the absorption of scattered radiation while allowing most of the primary radiation from the x-ray tube to pass through to the image receptor. This configuration is crucial because scattered radiation can degrade image quality by adding unwanted noise.

When comparing a high-ratio grid to a low-ratio grid, the most significant characteristic of a high-ratio grid is its ability to absorb more scattered radiation. This is accomplished due to the greater number of lead strips present in a high-ratio grid compared to a lower ratio grid, which allows it to more effectively block the randomly scattered x-rays that do not contribute to image formation. The high-ratio grid's design leads to a better contrast in the resulting images, as it minimizes the effect of scatter.

In contrast, a low-ratio grid allows a greater amount of primary radiation to pass through, but it does not absorb as much scattered radiation. However, it may lead to lower image quality due to increased scatter reaching the film or detector.

So, while it is true that a high-ratio grid absorbs more primary radiation compared to a low-ratio grid, its defining feature is its superior capability to absorb scattered radiation. Therefore, identifying the feature that best captures the advantage of