The digital CT image is an array of numbers arranged in a grid called a ______.

The digital CT image is an array of numbers arranged in a grid called a ______.

• A. Pixel
• B. Matrix
• C. Grid
• D. Image

Answer: (B)

The main idea is that a digital CT image is stored as a two-dimensional array of numbers, with each location in the grid holding the intensity value of a pixel. That entire grid is a matrix—a rectangular array with rows and columns. Each entry represents a pixel value, so the image itself is naturally represented as a matrix of pixel intensities. A single pixel is just one number, while a grid describes the layout, and the image is the whole collection of those numbers laid out in that grid. In practice, we often talk about the image as the image matrix or the pixel matrix for its data structure.

The main idea is that a digital CT image is stored as a two-dimensional array of numbers, with each location in the grid holding the intensity value of a pixel. That entire grid is a matrix—a rectangular array with rows and columns. Each entry represents a pixel value, so the image itself is naturally represented as a matrix of pixel intensities. A single pixel is just one number, while a grid describes the layout, and the image is the whole collection of those numbers laid out in that grid. In practice, we often talk about the image as the image matrix or the pixel matrix for its data structure.