Common problems and treatment in MRI scanning In the process of MRI scanning, we often encounter some tricky problems, how to solve it is directly related to the quality of our work, for this reason, we have figured out some effective therapies in our actual work. I. Pediatric patients: belong to special objects, good movement, fear and the noise of the machine, often make it difficult to scan successfully we take this approach, that is, the day before doing MRI examination, instruct the patient’s family, let the patient sleep late and get up early, so that they are sleep deprived, before scanning rectal infusion of 10% chloral hydrate, the dose of 10 weight, after sleeping, positional scanning, easy to succeed. Second, patients with impaired consciousness: mostly due to brain disease, completely comatose patients, the examination is more cooperative, but note that even if the examination of the head, it is best to open the respiratory and cardiac gating, so that the operator can monitor the patient’s breathing and heartbeat, in case the patient suddenly stops breathing and heartbeat and the doctor is totally unaware of it, leading to medical disputes; for irritable patients, depending on the situation, sedation can be given in appropriate amounts. However, it should be noted that drugs with obvious inhibitory effects on breathing should be used with caution. Third, patients with severe pain: cancer and part of the lumbar disc herniation and other severe pain, injection of strong painkillers such as dulcolax before the examination, pain relief after the examination, the appropriate position is also important, if necessary, prone or lateral position examination, pay attention to try to complete the scan in a short time. Fourth, hunchback patients: head scan, lateral position scanning, thoracic and abdominal scanning and thoracolumbar scanning, head and tail padding, padding, stable, or only pad the foot end, so that the upper body level, after completing the upper part of the scan, and then change the direction of the head and foot, to do a similar scan, to complete the lower part of the scan, such as the height of the rack aperture restrictions, the patient can not enter the magnetic field center, can also take the lateral position scanning. Fifth, scoliosis deformity patients (segmental scanning method): such patients in the spinal cord scan, not in the same plane to obtain the spinal cord image, can take the segmental method of scanning, but the scan time is slightly longer, can obtain the upper and lower segments of the scoliosis spinal cord image, integrated reading, will obtain a complete image, otherwise, it is difficult to scan the image to achieve diagnostic purposes. In principle, those who have metal implants in their bodies should be prohibited from doing MRI, but we feel that this is not the case, because the field strength of permanent magnetic resonance is low, and the metal artifacts are not necessarily heavy, and we have actual experience with those who have chemotherapy pumps placed in their abdomen, those who have titanium clips implanted in their membranes after laparoscopy, and those who have metal implants in parts far from the scanning site (such as head, chest and abdominal scans, patients with steel nails and plates in their lower limbs). (e.g. head, chest and abdominal scans, patients with steel nails and plates in the lower extremities) MRI examination is feasible depending on the situation. Seven, severe fever: severe fever patients appear at the moment of examination dripping sweat, heartbeat accelerated, near death, the need to immediately stop the scan, the patient out of the magnetic field center, some patients can continue to scan after a short rest and adaptation, part of the scan can not be completed. Eight, psychiatric patients and epileptic patients: Be sure to have a family member accompanied by the scan bedside, in order to prevent the scanning process in the noise induced by sudden seizures, the patient fell to the ground and damage the equipment. Nine, will not hold their breath (using the closed mouth pinch nose method): in doing chest and abdominal scans, such as MRCP, MRU, etc., often require patients to hold their breath, but some elderly and pediatric patients or poor understanding of elderly patients, a breath hold for more than ten seconds or two dozen seconds is very difficult, then the patient should be trained first, let the patient breathe in and then exhale, and then one hand pinch nose closed mouth. Almost all of them can achieve the purpose of breath-holding, and the scanned image is very satisfactory. If it is really difficult to hold the breath, you can also scan in the pause (PAUSE) once, but pay attention to the pause before and after the breathing amplitude as much as possible consistent. Ten, sleepy people: some patients scan two or three minutes after the noise hypnosis, that is, snoring, deep and long breathing, do abdominal scanning for a long time can not see the peak of the respiratory wave, easily lead to scan failure, delayed scanning time, the patient is instructed not to fall asleep. Eleven, no special coil (using a circle of multi-use): because of the fusion resonance coil is expensive, not all coils are available, or sometimes a coil is temporarily bad, do not prevent the adoption of a circle of multi-use, infant and child patients, the abdomen is too small, with the adult body coil scan out of the image quality is very poor, you can use the knee coil to scan the abdomen of infant and child patients, to obtain more satisfactory results (can be used without respiratory gating), with Knee coils can be used to scan the upper extremities (elbows and wrists) and lower extremities below the knee (ankles and feet) to obtain better results. With the body coil scanning bilateral femur can also obtain satisfactory results, but also use the neck coil scanning shoulder joints. Some patients are particularly timid and overly nervous. In this case, in addition to briefly introducing the principle of MRI to clear their nervousness, they should be accompanied by their family members or have the alarm handed over to the patient. As a doctor, do not deliberately train the patient to stay still, as long as he or she is instructed to stay still as usual, as long as he or she sleeps.