Which term describes the digital matrix of the image file?

Which term describes the digital matrix of the image file?

• A. DELs
• B. Voxels
• C. Pixels
• D. Dexels

Answer: (C)

The digital matrix of an image is described by pixels. In a 2D radiographic image, the grid of picture elements—rows and columns—are the pixels. Each pixel holds a brightness value that represents the X-ray attenuation at that point, and together, all the pixels form the complete image in the file. Voxels are used for 3D data (volume elements), not 2D images. DELs refer to detector elements in the sensing hardware, not the digital grid, and Dexels is not a standard term. So the correct term for the digital matrix is pixel.

The digital matrix of an image is described by pixels. In a 2D radiographic image, the grid of picture elements—rows and columns—are the pixels. Each pixel holds a brightness value that represents the X-ray attenuation at that point, and together, all the pixels form the complete image in the file. Voxels are used for 3D data (volume elements), not 2D images. DELs refer to detector elements in the sensing hardware, not the digital grid, and Dexels is not a standard term. So the correct term for the digital matrix is pixel.