Phantoms | Figure |
Homogeneous structure | |
Free-in-air | 1(a) |
Small water sphere | 1(b) |
Water cube | 1(c) |
Spherical QA phantom* | 1(d) |
Inhomogeneous structure | |
Resolution QA phantom* | 2(a) |
Bowl with fresh corn | 2(b) |
Wet sponge | 2(c) |
Pack of 6 wet sponges | 2(d) |