Tapesh Yadav, Clayton Kostelecky: Nanotechnology for drug delivery, contrast agents and biomedical implants. NanoProducts Corporation, Stuart T Langley, Hogan & Hartson L, August 23, 2005: US06933331 (100 worldwide citation)

A nanocomposite structure comprising a nanostructured filler or carrier intimately mixed with a matrix, and methods of making such a structure. The nanostructured filler has a domain size sufficiently small to alter an electrical, magnetic, optical, electrochemical, chemical, thermal, biomedical, or ...

Mauro Magnani, Antonella Antonelli: Delivery of contrasting agents for magnetic resonance imaging. Erydel S P A, Foley & Lardner, April 25, 2017: US09629933

Erythrocytes exposed to dialysis with an hypotonic buffer stably take up superparamagnetic iron oxide nanoparticles and may be used MRI contrast agents. Such erythrocytes may also be used as drug delivery vehicles.