1. A computer program product comprising: (a) a non-transitory computer readable medium including program instructions stored thereon which, when executed by a processor of a computing device, cause the computing device to perform a process including: (i) coregistering (x) a first depiction by a reference medical image of a region of interest of a mammalian body part during a first condition, the region of interest having a first spatial relationship to a landmark subsurface feature of the mammalian body part during the first condition, and (y) a second depiction by a target medical image of the region of interest of the mammalian body part during a second condition, the region of interest having a second spatial relationship to the landmark subsurface feature of the mammalian body part during the second condition, the second spatial relationship being different than the first spatial relationship, the coregistration of the first depiction and the second depiction at least partially based on the first spatial relationship and on the second spatial relationship; (ii) storing in another non-transitory computer-readable media operably coupled with processor informational data corresponding to the coregistration of the first depiction of the region of interest and the second depiction of the region of interest.