Which of the following describes the relationship between pixel size and pixel density?

The correct answer is that as pixel size increases, pixel density decreases. Pixel density, which refers to the number of pixels per unit area, is inversely related to pixel size. When pixel size increases, it means each pixel occupies more space on the imaging detector or display. Consequently, fewer pixels can fit in the same area, leading to a lower pixel density.

In imaging, smaller pixels allow for more detailed and sharper images, as they can represent finer details. Conversely, larger pixels result in a decrease in the total number of pixels that can fit within the same area, thereby reducing the overall resolution and image quality. Thus, understanding this inverse relationship between pixel size and pixel density is essential for radiologic technologists when assessing image quality and resolution in various imaging modalities.