"Molecular imaging" has been previously defined as "the in vivo characterization and measurement of biologic processes at the cellular and molecular level." This broad definition emerged during the last few years as a consequence of the convergence of molecular and cell biology with imaging science, including medical physics and technology. One of the major goals of molecular imaging has become the development of noninvasive strategies of "molecular profiling" in living subjects, ., the acquisition and analysis of maps reflecting the spatial and temporal distribution of a given molecular target at a precise anatomical location without biopsies. The mapping of disease-relevant.
