We develop an algorithm capable of detecting the presence of spherical voids in a thermally conducting object. In addition, the process recovers both the radii and locations of each void. Our method involves the application of a known steady state heat flux to the object's boundary and measurement of the induced steady state temperature on the boundary.
Oyeyemi, Victor B., "Non-Destructive Recovery of Voids within a Three Dimensional Domain Using Thermal Imaging" (2006). Mathematical Sciences Technical Reports (MSTR). 36.