Figure 4From: Development of antibody functionalized magnetic nanoparticles for the immunoassay of carcinoembryonic antigen: a feasibility study for clinical use Spiked-CEA-concentration-in-serum, ϕ CEA , and (a) IMR signal and (b) the CEA concentration, ϕ CEA-IMR , derived using the immunomagnetic reduction method. Back to article page