Compared with the SPIO probes that have been researched, in a previous work, the investigators combined molecular imaging and the advantages of RNA interference technology to synthesize molecular probes for the epidermal growth factor receptor highly expressed in ovarian cancer (double Function SPIO-shRNA molecular probe), which can integrate diagnosis and treatment, The results of the preliminary experiments confirmed that the probe had low cytotoxicity, and within a certain range of iron concentration, this had no significant effect on cell viability. Here, EGFR is linked to ovarian cancer.