Magnetic Ferritin Nanoprobe Imaging Analysis with MRI Slow Velocity Mapping Measurement

For effectively penetrating into tumors, drug diffusion speed should be greater than the outward tumor interstitial fluid (TIF) convection speed. Studying TIF is helpful to deeply understand the fluid behavior of tumor fluid flow and its impact on the delivery of nano drugs. In this experiment, an improved PC-MRI slow flow measurement sequence was used to detect the velocity of interstitial fluid in different tumor growth periods. Combined with clinical standard sequence, the relationship between the distribution of the magnetic ferritin (M-HFn) contrast agent in tumor and the velocity of TIF was observed and analyzed.