title: Nanoparticles: take only pictures, leave only footprints.
abstract: A phase I study of a tumor-targeted nanoshell in five patients documents an important milestone in the development of nanoparticles for molecular imaging in humans (Phillips et al., this issue).
authors.affiliation: Molecular Imaging Program, Building 10, National Cancer Institute, Bethesda, MD 20892, USA. pchoyke@nih.gov.
authors.forename: Peter L
authors.initials: PL
authors.lastname: Choyke
mesh_terms: D051928:CD47 Antigen / Q000276:immunology*; D004724:Endoscopy; D005260:Female; D006801:Humans; D008297:Male; D053758:Nanoparticles; D055095:Optics and Photonics; D049268:Positron-Emission Tomography; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis*
chemical_list: D051928:CD47 Antigen