Magnetic resonance imaging is a very common examination item. This examination is mainly suitable for patients with more complicated diseases. Only in this way can we know what kind of lesions have occurred in the patient's body through examination, so as to find the most suitable treatment method for ourselves. It is best not to drink water or consume other foods before doing an MRI, otherwise the examination results will become very inaccurate. Nuclear magnetic resonance is a physical process in which an atomic nucleus with a non-zero magnetic moment undergoes Zeeman splitting of its spin energy levels under the action of an external magnetic field and resonates to absorb radio frequency radiation of a certain frequency. Nuclear magnetic resonance spectroscopy is a branch of spectroscopy. Its resonance frequency is in the radio frequency band, and the corresponding transition is the transition of nuclear spin on the nuclear Zeeman energy level. Application of MRI: Magnetic resonance imaging (MRI) has become a common imaging examination method. As a new imaging examination technology, MRI will not affect human health. However, six groups of people are not suitable for MRI examination, namely: people with pacemakers, people with or suspected metal foreign bodies in the eyes, people who have undergone aneurysm silver clip ligation, people with metal foreign bodies or metal prostheses in the body, critically ill patients with life-threatening conditions, claustrophobia patients, etc. Monitoring equipment, rescue equipment, etc. are not allowed to be brought into the MRI examination room. In addition, pregnant women who are less than 3 months pregnant should not undergo MRI examinations. Magnetic resonance imaging is the latest medical imaging technology that uses the principle of nuclear magnetic resonance. It has excellent diagnostic capabilities for solid organs such as the brain, thyroid, liver, gallbladder, spleen, kidney, pancreas, adrenal glands, uterus, ovaries, prostate, as well as the heart and large blood vessels. Compared with other auxiliary examination methods, MRI has the advantages of multiple imaging parameters, fast scanning speed, high tissue resolution and clearer images. It can help doctors "see" early lesions that are difficult to detect. It has become a powerful tool for early screening of tumors, heart disease and cerebrovascular disease. It is understood that since metal will interfere with the external magnetic field, patients must remove all metal objects on their bodies before undergoing an MRI examination. Do not wear magnetic items such as watches, metal necklaces, dentures, metal buttons, metal contraceptive rings, etc. during MRI examination. In addition, people who wear pacemakers or have paramagnetic metal implants in their bodies, such as metal clips, stents, plates, and screws, cannot undergo MRI examinations. You must fast when performing MRI examination of the upper abdomen (such as liver, pancreas, kidney, adrenal gland, etc.), but you can drink plenty of water before the examination to help make the boundaries between the stomach, liver, and spleen clearer. |
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