One aspect relates to determining a location of an at least one X-ray fluorescing event occurring within an at least some matter of at least a portion of an individual, wherein the determining the location of the at least one X-ray fluorescing event is based at least in part on determining a relative angle at which an at least one applied high energy photon and/or particle is being applied to the at least some matter of the at least the portion of the individual, a relative position from which an at least one applied high energy photon and/or particle is being applied to the at least some matter of the at least the portion of the individual, a detected location of an at least one induced fluorescing X-ray photon fluoresced during the at least one X-ray fluorescing event, and a received angle at which the at least one induced fluorescing X-ray photon is received.