Body part positioning table or table overlay having multiple mask mounting systems

1. A body part positioning structure, comprising:

a planar member having an upper surface to support at least a portion of a body part, and further comprising:

a first mask mounting system having a first physical arrangement of mask attachment structures, at first positions upon the upper surface, for mounting a first mask to secure the at least a portion of the body part upon the upper surface of the planar member; and

a second mask mounting system having a second physical arrangement of mask attachment structures, at second positions upon the upper surface, for mounting a second mask to secure the at least a portion of the body part upon the upper surface of the planar member,

wherein, when the first mask is mounted to the upper surface using the first mask mounting system, the second mask is precluded from also being mounted to the upper surface due to the first physical arrangement of the mask attachment structures, and

wherein, when the second mask is mounted to the upper surface using the second mask mounting system, the first mask is precluded from also being mounted to the upper surface due to the second physical arrangement of the mask attachment structures.

2. The body part positioning structure of claim 1 , further comprising:

a third mask mounting system having a third physical arrangement of mask attachment structures, at third positions upon the upper surface, for mounting a third mask to secure the at least a portion of the body part upon the upper surface of the planar member.

3. The structure of claim 1 , wherein the body part positioning structure comprises a table or table overlay.

4. The structure of claim 1 , wherein the first mask comprises a first type of body part positioning mask and the second mask comprises a second, different type of body part positioning mask.

5. The structure of claim 1 , wherein the first physical arrangement of mask attachment structures comprises an arrangement of the mask attachment structures in a first physical configuration upon the upper surface of the planar member, or in or through, the upper surface of the planar member, and

wherein the second physical arrangement of mask attachment structures comprises an arrangement of the mask attachment structures in a second, different physical configuration upon the upper surface of the planar member, or in or through, the upper surface of the planar member.

6. The structure of claim 5 , wherein the mask attachment structures comprise retention holes, wherein the first physical configuration comprises a first pattern of retention holes through the planar member, and wherein the second physical configuration comprises a second, different pattern of retention holes through the planar member.

7. The structure of claim 1 , wherein each of the mask attachment structures comprises at least one of a pin, screw, bolt, clamp, retention hole, clip, anchor, strap, or latch.

8. A table or table overlay, comprising:

a planar surface to support a body part, and further comprising:

a first mask mounting system having a first configuration, encompassing a first area of the planar surface, for mounting a first mask that positions and secures the body part upon the planar surface; and

a second mask mounting system having a second configuration, encompassing a second area of the planar surface, for mounting a second mask that positions and secures the body part upon the planar surface,

wherein the first area and the second area overlap one another such that the first mask and the second mask cannot both be simultaneously mounted to the planar surface.

9. The table or table overlay of claim 8 , wherein the first mask comprises a first type of mask and the second mask comprises a second, different type of mask.

10. The table or table overlay of claim 8 , wherein the first mask mounting system comprises a first arrangement of mask attachment structures, and the second mask mounting system comprises a second arrangement of mask attachment structures.

11. The table or table overlay of claim 10 , wherein the first arrangement of mask attachment structures comprises an arrangement of the mask attachment structures in a first physical configuration upon, in, or through the planar surface, and

wherein the second arrangement of mask attachment structures comprises an arrangement of the mask attachment structures in a second, different physical configuration upon, in, or through the planar surface.

12. The table or table overlay of claim 10 , wherein each of the mask attachment structures comprises at least one of a pin, screw, bolt, clamp, retention hole, clip, anchor, strap, or latch.

13. The table or table overlay of claim 11 , wherein the mask attachment structures comprise retention holes, wherein the first physical configuration comprises a first pattern of retention holes through the planar surface, and wherein the second physical configuration comprises a second, different pattern of retention holes through the planar surface.

14. The table or table overlay of claim 8 , further comprising:

a third mask mounting system having a third configuration, encompassing a third area of the planar surface, for mounting a third mask that positions and secures the body part upon the planar surface,

wherein the first area, the second area, and the third area overlap one another such that any two of the first mask, the second mask, or the third mask cannot be simultaneously mounted to the planar surface.

15. A body part positioning structure, comprising:

a planar member having an upper surface to support at least a portion of a body, and further comprising:

a first mask mounting system for mounting a first mask to position and secure the at least a portion of the body to the upper surface of the planar member; and

a second mask mounting system for mounting a second mask to position and secure the at least a portion of the body relative to the upper surface of the planar member,

wherein the first mask mounting system comprises a first physical arrangement of mask attachment structures on, in, or through the upper surface of the planar member, wherein the first physical arrangement of mask attachment structures encompasses a first area of the upper surface of the planar member,

wherein the second mask mounting system comprises a second physical arrangement of mask attachment structures on, in, or through the upper surface of the planar member, or in or through the upper surface of the planar member, wherein the second physical arrangement of mask attachment structures encompasses a second area of the upper surface of the planar member, and

wherein the first area overlaps the second area such that the first mask and the second mask cannot both be simultaneously mounted to the upper surface of the planar member.

16. The structure of claim 15 , wherein the body part positioning structure comprises a table or table overlay.

17. The structure of claim 15 , wherein each of the mask attachment structures comprises at least one of a pin, screw, bolt, clamp, retention hole, clip, anchor, strap, or latch.

18. The structure of claim 15 , wherein the mask attachment structures comprise retention holes, wherein the first physical arrangement comprises a first pattern of retention holes through the planar member, and wherein the second physical arrangement comprises a second, different pattern of retention holes through the planar member.

19. The structure of claim 15 , further comprising:

a third mask mounting system for mounting a third mask to position and secure the at least a portion of the body to the upper surface of the planar member,

wherein the third mask mounting system comprises a third physical arrangement of mask attachment structures on, in, or through the upper surface of the planar member,

wherein the third physical arrangement of mask attachment structures encompasses a third area of the upper surface of the planar member, and

wherein the first area, the second area, and the third area overlap one another such that any two of the first mask, the second mask, or the third mask cannot be simultaneously mounted to the upper surface of the planar member.

20. The body part positioning structure of claim 1 , wherein the first mask and the second mask comprise differently configured mask structures, with each of the mask structures having a material that form fits to the at least a portion of the body part to secure the at least a portion of the body part upon the upper surface of the planar member.