Which system is characterized by not using a grid?

Magnification mammography systems are specifically designed to enhance the visualization of small lesions and details in breast tissue. These systems utilize a different approach to achieve high-resolution images, focusing on enlarging the area of interest without the need for a grid. The absence of a grid in this system is significant because it allows for greater flexibility in positioning and reduces unnecessary artifacts that could obscure fine details.

In this context, grids are typically employed in standard mammography and digital mammography systems to reduce scatter radiation and improve the contrast of the images. However, in magnification mammography, the primary goal is to have an unobstructed view of smaller structures, and using a grid could potentially compromise that clarity. Therefore, the magnification system operates effectively without a grid, making it uniquely positioned in this regard compared to other mammography systems.