When the matrix size increases, the size of the pixels within the image:

When the matrix size increases, the size of the pixels within the image:

• A. Increases
• B. Varies With Field of View
• C. Remains the Same
• D. Decreases

Answer: (D)

Pixel size is determined by how much image area you’re capturing (the field of view) and how many pixels you divide that area into (the matrix size). The pixel size, or pixel pitch, equals FOV divided by the matrix dimensions. If you keep the field of view the same and increase the matrix size, you’re spreading the same area over more pixels, so each pixel covers a smaller area. In other words, the pixels get smaller, which improves the ability to resolve fine details. If the field of view were changing instead, pixel size would change accordingly, but with a fixed field of view, increasing the matrix size reduces pixel size.

Pixel size is determined by how much image area you’re capturing (the field of view) and how many pixels you divide that area into (the matrix size). The pixel size, or pixel pitch, equals FOV divided by the matrix dimensions. If you keep the field of view the same and increase the matrix size, you’re spreading the same area over more pixels, so each pixel covers a smaller area. In other words, the pixels get smaller, which improves the ability to resolve fine details. If the field of view were changing instead, pixel size would change accordingly, but with a fixed field of view, increasing the matrix size reduces pixel size.