What is the term for the opposite of isotropic resolution?

What is the term for the opposite of isotropic resolution?

• A. Isotropic resolution
• B. Anisotropic resolution
• C. Equal-resolution
• D. Symmetric resolution

Answer: (B)

Direction-dependent resolution is described as anisotropic resolution. When resolution varies by direction, you have higher detail in some axes and lower in others, which is common when voxel dimensions aren’t equal (for example, very fine in-plane pixels but thicker slices along the depth). Isotropic resolution, by contrast, means equal resolution in all directions, so the term that matches the idea of being different by direction is anisotropic. The other options aren’t standard terms for this concept, and would imply equality or symmetry rather than direction dependence.

Direction-dependent resolution is described as anisotropic resolution. When resolution varies by direction, you have higher detail in some axes and lower in others, which is common when voxel dimensions aren’t equal (for example, very fine in-plane pixels but thicker slices along the depth). Isotropic resolution, by contrast, means equal resolution in all directions, so the term that matches the idea of being different by direction is anisotropic. The other options aren’t standard terms for this concept, and would imply equality or symmetry rather than direction dependence.