Porphyrin and porphysomes and their cousin phthalocyanines have a unique
position in that porphyrin is a component to constitute endogenous substance of
heme. And interestingly, it makes a complex to yield sizable nanomaterials. The
labeling of porphysomes with radionuclides and their implied use for in vivo
delivery of radionuclides are detailed in Chap. 3. The readers are recommended to
pay attention to the theranostic capability of these materials. In addition, recent
introduction of graphenes and radiographenes raised great hope for the possible use
as drug carrier or radionuclide carrier. Explicit understanding of in vivo behavior of
graphene oxides having inherent heterogeneity of size and shape and contents of
functional carboxyl or hydroxyl residues requires much further investigation.
Radiolabeling of these materials shall elucidate the potential of graphenes in vivo in
human and possibly in clinics. Surveying all these nanomaterials in this part is
supposed to help clarify the significance of the old and new exogenous nanomaterials, which leads to the following parts.
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Part I: Exogenous Radionanomedicine