What is a shoulder MRI scan?
MRI扫描使用磁铁和无线电波来捕获身体内部结构的图像。它不涉及手术切口。扫描允许您的医生看到您的骨骼以及身体的软组织，包括肌肉，韧带，肌腱，甚至神经和血管。
虽然MRI扫描可以在身体的任何部位进行，但肩部MRI扫描专门帮助您的医生看到肩部区域中的骨骼，血管和组织。
A shoulder MRI helps your doctor diagnose potential problems found in other imaging tests, such as X-rays. It also helps your doctor diagnose unexplained pain in the area or better understand the condition causing your shoulder symptoms.
An MRI scan works by generating a magnetic field that temporarily aligns the water molecules in your body. Radio waves use these aligned particles to produce faint signals, which are recorded as images by the machine.
UnlikeX射线andCT scans, an MRI scan uses no radiation and is considered a safer alternative, especially for pregnant women and children.
这肩膀is a large and complicated joint that we use on a daily basis. It’s made up of three major bones. This makes it the most mobile joint in the body. As a result, numerous problems can affect our shoulders.
疼痛或受伤是您的医生可能订购MRI扫描的主要原因。伤害可能是影响的结果，或者只是简单的长期磨损和关节撕裂的影响。可能需要肩部MRI扫描的具体问题包括：
- dislocationof your shoulder joint
- 退行性关节疾病，如关节炎
- rotator cuff tears
- 骨折
- sports-related injuries
- 无法解释的痛苦和肿胀
- decreased range of motion
- infections or tumors
In some cases, an MRI scan can help your doctor track the effect of surgeries, medications, or physical therapy on your shoulder.
MRI扫描仍然存在很少的风险，因为它们不使用辐射。迄今为止，扫描中使用的无线电波和磁体没有记录的副作用。尽管如此，有某种情况的人确实面临着一些风险。
金属植入物
If you have implants containing metal, it can cause problems with an MRI scan. The magnets used can interfere with pacemakers or cause implanted screws or pins to shift in your body. Be sure to tell your doctor if you have any of the following implants:
- artificial joints
- artificial heart valves
- metal clips from aneurysm surgery
- 子弹或其他金属碎片
- a pacemaker
- cochlear implant
如果您有起搏器，您的医生可能会建议检查肩部区域的另一种方法，例如CT扫描。这取决于你的起搏器。一些起搏器模型可以在MRI扫描之前重新编程，以便在考试期间没有中断。
Dye allergy
Some people can have an allergic reaction to the contrast dye. Contrast dye helps provide a clearer image of the blood vessels. The most common type of contrast dye is gadolinium. According to theRadiological Society of North America，这些过敏反应通常温和，并且用药物易于控制。一定要告诉你的医生有关任何过敏，还是如果你对过去对比染料的过敏反应。
Breastfeeding
Women shouldn’t breastfeed 24 to 48 hours after they’ve been given contrast dye. They need to wait for the dye to leave their bodies.
Tell your doctor if you have any metal in your body from previous procedures or injuries. You’ll need to remove any metal from your body, including jewelry and body piercings before the test. You’ll change into a hospital gown so that metal on your clothing doesn’t affect the test.
如果你是幽闭的恐惧症或封闭空间中的艰难时间，如果在MRI机器中可能会感到不舒服。你的医生可以戒指令人既的药物治疗，以帮助你的不适。在某些情况下，您也可能在测试期间镇静。
If your test requires the use of contrast dye, a nurse or doctor injects it into your bloodstream through an intravenous line. You may need to wait for the dye to circulate through your body before beginning the test.
An MRI machine is a giant white tube with a sliding bench attached to it. You lie on your back on the table and slide into the machine. A technician places small coils around your shoulder to improve the quality of the scan images.
这technician controls the movement of the bench using a remote control from another room. They can communicate with you via a microphone.
这machine makes loud whirring and thumping noises as the images are being recorded. Many hospitals offer earplugs. Others have televisions or headphones to help you pass the time.
在被拍摄的照片中，技术人员会要求您屏住呼吸几秒钟。在测试期间，您不会感到任何感觉。
典型的肩部MRI扫描需要45分钟到一个小时才能完成。
在肩部MRI扫描之后，除非您的医生否则告诉您，否则您可以自由离开医院。如果您被遗产，您需要等到在驾驶前完全疲惫不堪。或者您可以在测试后安排回家。
如果您的MRI图像投射到电影上，则电影可能需要几个小时的时间。您的医生还需要一些时间来查看图像并解释结果。更多现代机器在计算机上显示图像，因此您的医生可以快速查看它们。
MRI扫描的初始结果可能在几天内到达，但综合结果可能需要一周或更长时间。
当结果可用时，您的医生会致电您审查并解释它们。可能需要进行更多的测试来进行诊断。