What is the interspace material commonly made of in a grid?

In a grid used in radiography, the interspace material is commonly made of aluminum. This material is chosen due to its lightweight, durability, and effectiveness in allowing x-rays to pass through while absorbing scattered radiation, thus improving image quality. Aluminum has favorable mechanical properties that make it suitable for maintaining the structural integrity of the grid while also being effective in minimizing the amount of secondary radiation that reaches the image receptor.

Selecting aluminum as the interspace material in grids helps to optimize the balance between maintaining image clarity and minimizing patient radiation exposure. Other materials such as plastic or carbon may not possess the same level of radiopacity or structural support required, and glass is not typically used due to its fragility and inability to withstand the rigors of clinical use. Therefore, aluminum stands out as the preferred choice in medical imaging grids.