Superconducting nuclear magnetic resonance is a branch within nuclear magnetic resonance. 1. Nuclear magnetic resonance: divided into superconducting nuclear magnetic resonance and permanent magnet magnetic resonance, nuclear magnetic resonance, also known as magnetic resonance imaging, nuclear magnetic, MRI, is today’s common clinical imaging methods. It mainly utilizes a strong external magnetic field and the hydrogen nuclei in the human body to produce a magnetic resonance phenomenon when specific radio frequency pulses are applied, and eventually a check-up method through professional equipment imaging. It can be applied to the examination of all parts of the body, providing a strong basis for doctors to understand the location and extent of the patient’s lesions and for the patient’s subsequent treatment. 2. Superconducting nuclear magnetic resonance: only one kind of nuclear magnetic resonance, its principle is to use the coil in low temperature to produce high field strength stable magnetic field, through technical means to improve the strength of the magnetic field, so that the image is more delicate.