MRI scan

Magnetic resonance imaging is an MRI scan that does not inject contrast media. It uses nuclear spin motion. Under the action of a static magnetic field, the original disordered hydrogen nuclei are arranged in the direction of the external magnetic field and continue to move. When the external magnetic field is stopped immediately, The hydrogen atoms in the human body will return to the original state at the same time in the same tissue; this is called relaxation (RELAXATION) and the human tissue relaxation time is different under pathological conditions. These signals are collected by computer system and converted into images by digital reconstruction technology. To provide scientific diagnostic results for clinical and research. Basic Information Specialist classification: growth and development check classification: nuclear magnetic resonance Applicable gender: whether men and women apply fasting: not fasting Tips: equipped with cardiac pacemaker, artificial heart valve, artificial cornea, metal clip after vascular surgery, tracheal intubation, contraceptive ring, metal foreign body and artificial joints, etc., please declare to the doctor to confirm whether this check can be carried out . Otherwise, the position of the metal foreign matter may move due to the attraction of the magnet, causing a hazard. Normal value Check that no abnormal area was found. Clinical significance Abnormal results: The longitudinal relaxation time is called T1. The transverse relaxation time is called T2. During the inspection, depending on the inspection site, it is observed whether there is an abnormal area in the inspection site. The people who need to be examined: cancer patients, encephalopathy patients, etc., need to be analyzed in combination with specific diseases and the patient's physical condition. Precautions Forbidden before inspection: Metal objects that will be carried with you before entering the scanning room, such as: mobile phones, pagers, watches, hairpins, jewelry, knives, magnetic record cards, credit cards, metal ornaments, belts, movable dentures, prostheses, metal buttons , hearing aids, etc. remain in the waiting room. When you have abdominal liver, gallbladder, pancreas, and spleen, please fast before 6 hours. Requirements for inspection: Critical patients should be accompanied by a clinician; patients who are unable to cooperate with the patient should be examined after treatment in the clinical department. It takes about 25 minutes to complete a magnetic resonance examination. During the inspection, you will hear the hum of the machine. At this time, please rest as much as possible, and breathe smoothly. Do not move the body to avoid affecting the image quality. An enhanced scan may be required after the end of the sweep to further clarify the diagnostic cost. On the day of the test, please bring relevant medical information such as CT, X-ray, angiogram, radionuclide examination, endoscopy and B-ultrasound test list, etc., in order to diagnose the doctor for comprehensive analysis. Inspection process The patient goes inside the examination room and checks before the MRI instrument. Nuclear spin motion is the basis of magnetic resonance imaging, and hydrogen atoms are the most abundant substances in the human body; under normal circumstances, the hydrogen nuclei in the human body are in an irregular precession state, when the human body enters a strong and uniform magnet space, Under the action of static magnetic field, the original disordered hydrogen nuclei are arranged in the direction of the external magnetic field and continue to move. When the external magnetic field is stopped immediately, the hydrogen atoms in the human body will return to the original state at the same time in the same tissue; this is called relaxation. [RELAXATION] The human tissue relaxation time under pathological conditions is different. The signals collected by the computer system are converted into images by digital reconstruction technology to provide scientific diagnosis results for clinical and research. Not suitable for the crowd Inappropriate people: equipped with cardiac pacemaker, artificial heart valve, artificial cornea, metal clip after vascular surgery, tracheal intubation, contraceptive ring, metal foreign body and artificial joints, etc., please declare to the doctor to confirm whether this can be carried out an examination. Otherwise, the position of the metal foreign matter may move due to the attraction of the magnet, causing a hazard. Adverse reactions and risks No relevant information.