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Absolute Mag™ DOTA Magnetic Particles, Dextran Coated, 30 nm (Cat# WHM-P002) are superparamagnetic iron oxide nanoparticles with a dextran coating. Dextran coating magnetic nanoparticles are functionalized with DOTA chelate for nuclear medicine and PET/SPECT imaging applications. They have a blood half-life of several hours. These particles provide a strong T2 MRI image and also are used to chelate Tc-99m for SPECT or Cu-64 for PET imaging applications.