The intensity of magnetic fields is different: Theoretically, increasing the intensity of the magnetic field is proportional to the resolution of the image, which means that the resolution of 3T is higher and the focus can be seen more clearly. As the magnetic field strength changes, the resonance frequency of the corresponding coil also changes, and the gradient channels of the receiving channel all change together. Therefore, 3T and 1.5T are two almost completely different systems.
Although the signal to noise ratio of 1.5T magnetic resonance images is not as high as that of 3.0T images, the inspection cost is relatively low, so generally, 1.5T images with low requirements for image signal to noise ratio can be competent.
Nuclear magnetic resonance (NMR) is a physical process in which the spin level of an atomic nucleus with a non zero magnetic moment undergoes Zeeman splitting under the action of an external magnetic field, and resonance absorbs radio frequency radiation at a certain frequency.
Nuclear magnetic resonance spectroscopy is a branch of spectroscopy, where the resonance frequency is in the radio frequency band, and the corresponding transition is the transition of the nuclear spin at the nuclear Zeeman level.
Application of magnetic resonance imaging (MRI): Magnetic resonance imaging (MRI) has become a common imaging modality. As a new imaging technique, MRI will not have an impact on human health.
