The smallest distinguishable part of a 3D image is called:

The smallest distinguishable part of a 3D image is called:

• A. Voxel
• B. Amplitude
• C. A-Mode
• D. Distance

Answer: (A)

In 3D imaging, the smallest distinguishable part is the voxel. A voxel, or volume element, is the tiny cube (or rectangular prism) of tissue that occupies a spot in three dimensions (x, y, z) and carries a single value representing the echo strength at that location. The image’s spatial resolution is set by voxel size—the smaller the voxel, the finer the detail you can resolve because more volume is sampled. Amplitude describes how strong an echo is, not a spatial sample. A-Mode is a one-dimensional depth display, not a 3D element. Distance is a general measurement, not a specific image element. Therefore, the smallest distinguishable part of a 3D image is a voxel.

In 3D imaging, the smallest distinguishable part is the voxel. A voxel, or volume element, is the tiny cube (or rectangular prism) of tissue that occupies a spot in three dimensions (x, y, z) and carries a single value representing the echo strength at that location. The image’s spatial resolution is set by voxel size—the smaller the voxel, the finer the detail you can resolve because more volume is sampled. Amplitude describes how strong an echo is, not a spatial sample. A-Mode is a one-dimensional depth display, not a 3D element. Distance is a general measurement, not a specific image element. Therefore, the smallest distinguishable part of a 3D image is a voxel.