In what way can digital subtraction angiography (DSA) enhance fluoroscopic imaging?

Digital subtraction angiography (DSA) enhances fluoroscopic imaging primarily by subtracting the background structures from the images, allowing for a clearer view of the vascular details. This technique involves taking a series of images before and after the contrast agent is injected. The initial images, captured without contrast, contain all anatomical structures, while subsequent images with the contrast agent highlight only the blood vessels. By mathematically removing the background information from the initial images, DSA effectively emphasizes the arteries and veins, providing a much clearer representation of the vascular system. This capability is crucial for accurate diagnosis and treatment planning in various medical conditions related to blood vessels.

The other options do not accurately describe how DSA functions or enhance imaging. Increasing the radiation dose does not improve image quality; improving brightness without processing does not leverage the main advantage of DSA; and using a higher frame rate, while it could lead to smoother motion capture, does not directly contribute to the enhanced visualization of vasculature achieved through subtraction techniques.