In three-dimensional ultrasound data, what term refers to the basic 3D unit?

In three-dimensional ultrasound data, what term refers to the basic 3D unit?

• A. Volume point
• B. Voxel
• C. Pixel
• D. Slice

Answer: (B)

In 3D ultrasound data, space is built from tiny volume elements called voxels. A voxel is the 3D counterpart of a pixel, representing information for a small cube of tissue defined along all three spatial dimensions. This makes voxels the fundamental units used for constructing and rendering the volume, with their size along x, y, and z determining the dataset’s spatial resolution. Other terms like pixel refer to 2D elements, a slice is a single plane, and a volume point isn’t the standard way to describe the basic 3D unit, so voxel is the correct choice.

In 3D ultrasound data, space is built from tiny volume elements called voxels. A voxel is the 3D counterpart of a pixel, representing information for a small cube of tissue defined along all three spatial dimensions. This makes voxels the fundamental units used for constructing and rendering the volume, with their size along x, y, and z determining the dataset’s spatial resolution. Other terms like pixel refer to 2D elements, a slice is a single plane, and a volume point isn’t the standard way to describe the basic 3D unit, so voxel is the correct choice.