The memory jingle of magnetic * * * vibration t 1t2 signal is as follows: T 1 weighted imaging (T 1WI) refers to the longitudinal relaxation difference of prominent tissues. The shorter t 1, the stronger the finger signal, and the longer t 1, the weaker the finger signal. T 1 is generally used to observe anatomy.

Because nuclear magnetic resonance is magnetic field imaging, there is no radioactivity, so it is harmless to human body and very safe. It is understood that at present, there is no international report on the harm caused by the use of nuclear magnetic resonance imaging, and there is no phenomenon that the incidence of gene mutation or chromosome aberration increases due to nuclear magnetic resonance imaging.

Correlation principle

Magnetic resonance imaging (MRI) is a new medical imaging technology based on the principle of magnetic resonance imaging, which has a good diagnostic function for brain, thyroid, liver, gallbladder, spleen, kidney, pancreas, adrenal gland, uterus, ovary, prostate and other solid organs, as well as heart and great vessels.

Compared with other auxiliary examination methods, magnetic resonance imaging (MRI) has the advantages of more imaging parameters, faster scanning speed, higher tissue resolution and clearer images, which can help doctors "see" early lesions that are not easy to detect and become a weapon for early screening of tumors, heart diseases and cerebrovascular diseases.

Baidu encyclopedia-nuclear magnetic resonance