MRI of nasopharyngeal cancer can see that the signal of nasopharyngeal cancer tissue is higher than that of the surrounding muscle tissue. If enhanced MRI is done, the enhancement may be more obvious and the signal intensity of the tumor tissue is more uniform, if there is local necrosis, the signal intensity may be less uniform. Through MRI, it can find out whether nasopharyngeal cancer has invaded the parapharyngeal space and posterior pharyngeal space, whether there are deep neck lymph node metastasis and other related manifestations, and can determine the relationship between nasopharyngeal cancer and surrounding neck blood vessels. When MRI is done for nasopharyngeal cancer, it is more advantageous than CT examination because the resolution of MRI in judging soft tissues is higher than that of CT, which is mainly to judge whether there is bone destruction and other related conditions of nasopharyngeal cancer. MRI is a method to examine nasopharyngeal cancer, but clinically, it is still necessary to do nasopharyngeal biopsy for pathology to confirm the diagnosis.