There was a recent paper in Medical Design Briefs (Purdue Universtiy study) that described how nano particles were used in imaging. there was a statement that said:
"Unlike previous approaches using tiny metallic nanorods and nanospheres, the new technique does not cause heat damage to tissue being imaged."
I suggest that we use that "imperfection" to eliminate bad tissue. This is accomplished by creating nano structures that are designed to attach themselves to a particular bad tissue type (cancers, growths, tumors etc.) and then to be activated by the light pulses destroying the bad tissue cells. This, in turn, destroys the bad tissue at the molecular level. No damage to surrounding tissue, localized treatment to affected areas only, no radiation, and better patient care.
Metallic nanorods and nanospheres can be structured so that they "fit" into unwanted growths. the unwanted growths are trying to attack good tissue and thus are "looking" for a particular molecular signature to attach to. We make the nano structures mimic this good tissue signature and it is attached to the bad tissue. When the bad tissue is saturated, it is ready for illumination (creating heating and destruction of the bad tissue) good tissues are not looking for this particular shape to attach to and hence are not affected by the light pulses.
Any excess nanorods and nanospheres that do not attach themselves are eliminated from the body via the bloodstream and bodily waste.