Grids with strips that are linear but slanted to match the divergence of the x-ray beam are known as which type of grids?

Grids with strips that are linear but slanted to match the divergence of the x-ray beam are known as focus grids. The primary purpose of focus grids is to enhance the quality of the image by minimizing the amount of scattered radiation that reaches the image receptor. The slanted orientation of the grid strips allows them to effectively align with the divergent rays of the x-ray beam, ensuring that only the primary radiation passes through while absorbing scattered radiation.

This design is particularly important in mammography, where the quality of the image is crucial for accurate diagnosis. Focus grids can help improve contrast and detail in mammographic images, making them a preferred choice in settings where precision is essential. In contrast, other types of grids, such as parallel grids, do not account for the divergence of the beam and may not provide the same level of image clarity and detail.