The security problem of MRI still can not be ignored. To be familiar with MRI related matters, carry out in the clinical examination and use the MR imager better and more safely, make it play the most important role.

Investigation, experiment, trial production and other activities in order to understand the intrinsic nature and movement rules of objective things by means of scientific research means and equipment.

With the widespread use of computers in enterprises, data security has gradually become a key issue.

Prison facilities around the world face various kinds of contraband challenges every day.

A relatively special environment, regardless of its location, service object, management model, medical care mode, method, and social status, shows its different characteristics.