Magnetic Resonance Imaging

Magnetic resonance water imaging uses the long T2 characteristic of water. The T2 value of static or slow-flowing fluid in the body is much larger than that of other tissues. The heavy T2 sequence with heavy T2 weight (selecting very long TE), transverse magnetization of other tissues. The vector is almost completely attenuated, the signal strength is very low and there is almost no signal, and the water still maintains a large transverse magnetization vector, allowing the aqueous organ to develop. Basic Information Specialist Category: Inspection Category: Nuclear Magnetic Resonance Applicable gender: whether men and women apply fasting: fasting Tips: Pregnant women should be examined carefully. If they are pregnant, please inform the doctor. Normal value Check for abnormal lumps and areas. Clinical significance Abnormal result Urinary tract imaging is often based on urinary angiography, but it is affected by factors such as patient age, allergies, renal function, etc., or can not be used for angiography, or can not achieve the purpose of diagnosis. With the development of magnetic resonance imaging technology, because of its Non-invasive, safe and simple, no contrast agent, multi-azimuth imaging, multi-angle observation, etc., can solve the deficiencies of routine urography, and has certain significance for guiding clinical treatment. In addition, magnetic resonance cholangiopancreatography is currently It has been used as an evaluation method for pancreaticobiliary system imaging, which can directly display the morphology and structure of pancreaticobiliary duct. In addition, by selecting suitable parameters, VitC can better display lesions such as dilatation, stenosis, displacement and destruction of the parotid duct and branches. Combined with routine scanning of the parotid gland, it has a better effect on guiding clinical treatment and surgery. Not only that, but also for the diagnosis of cerebrospinal fluid rhinorrhea. People who need to be examined: people with urinary dysfunction and abnormal kidney function. Precautions Taboo before inspection: no special contraindications. Requirements for inspection: Check your relaxation and follow the doctor's instructions. Inspection process This technique is very sensitive to slow or stagnant fluids (such as cerebrospinal fluid, bile, gastrointestinal fluids, urine), with high signal, low signal to substantial organs and flowing fluids, and reconstruction of the original image using maximum intensity projection (MIP). An image similar to an injection contrast agent or a venous pyelography can be obtained. Not suitable for the crowd Inappropriate crowd: 1. Those who install artificial heart pacemakers and nerve stimulators are forbidden to check. 2. It is forbidden to check if there is a silver clip in the skull and a metal foreign object in the eyeball. 3. The ECG monitor cannot enter the MRI examination room. Those who have undergone arterial surgery, have had heart surgery and have an artificial heart valve are forbidden to check. 4, a variety of critically ill patients: such as coma after trauma or accident, irritability, arrhythmia, respiratory insufficiency, constant blood loss and incontinence and so on. 5. Metal objects (such as internal fixed steel nails) cannot be inspected at the inspection site. 6. Pregnant women should be examined carefully. If they are pregnant, please inform the doctor. Adverse reactions and risks Nothing.