In computed radiography, each pixel corresponds to a shade of gray representing an area in the patient known as a(n):

In computed radiography, each pixel corresponds to a shade of gray representing an area in the patient known as a(n):

• A. Pathology
• B. Density
• C. Voxel
• D. Artifact

Answer: (C)

The brightness of each pixel in computed radiography reflects the x-ray attenuation within a tiny volume of tissue. That tiny volume is a voxel, or volume element. Although the image we see is two-dimensional, each pixel corresponds to the average attenuation of the tissue within that small 3D region along the x-ray beam. So the area represented by a pixel is a voxel. Pathology is a disease condition, not a specific spatial unit. Density is a property that influences attenuation, not the basic unit of image representation. Artifact is something that distorts or alters the image, not the tissue area being sampled.

The brightness of each pixel in computed radiography reflects the x-ray attenuation within a tiny volume of tissue. That tiny volume is a voxel, or volume element. Although the image we see is two-dimensional, each pixel corresponds to the average attenuation of the tissue within that small 3D region along the x-ray beam. So the area represented by a pixel is a voxel. Pathology is a disease condition, not a specific spatial unit. Density is a property that influences attenuation, not the basic unit of image representation. Artifact is something that distorts or alters the image, not the tissue area being sampled.