磁共振成像（MRI）丨医学英语视听学习

Magnetic Resonance Imaging (MRI)

磁共振成像（MRI）

Magnetic Resonance Imaging, commonly known as MRI, helps doctors find, watch, and treat medical problems. 

磁共振成像，俗称 MRI，有助于医生查找、观察、以及治疗疾病。

MRI uses very strong magnets, radio waves, and a computer to make pictures of the inside of the body. MRI pictures are more detailed than those made with other methods. 

MRI 使用强磁场、无线电波，以及计算机拍摄人体内部的图像。MRI图像较其他方法更为详细。

There are many reasons to have MRI. MRI may find bleeding, such as bleeding in the brain; brain changes as in stroke; problems with your back, such as a herniated disc; and an injury inside the body, such as a torn anterior cruciate ligament.

MRI 的用途很广泛，可检查出血，如脑出血；中风等脑改变；背部疾病，如椎间盘突出；身体内部损伤，如前交叉韧带撕裂。

Before MRI, you will remove all metal objects. And it\'s not safe to have MRI with some medical implants. You should tell the MRI technologist about any metal device or implant you may have in your body, such as a pacemaker. 

行 MRI 检查前，应去除所有金属物品。身体内有植入物时，行 MRI 也是不安全的。患者应告知 MRI 技术人员自身体内的任何金属装置或植入物，如起搏器。

To prepare for MRI, you will lie on a table just outside the scanner. MRI scanners are very noisy. So you will probably wear earplugs or headphones. Different equipment, such as pillows and straps, will help you stay in the correct position. 

MRI 检查的准备工作：患者躺在扫描仪外的桌子上。MRI 扫描仪噪音很大，所以患者可能会佩戴耳塞或耳机。充气枕和带子等不同的设备有助于患者保持正确的姿势。

Once you\'re ready, the table will slide into the scanner. Most often, closed scanners, such as this one, are used. The area inside is very narrow. 

准备工作完成后，立即将桌子滑入扫描仪。大多数情况下使用封闭式扫描仪，类似于这台机器。扫描仪内很狭窄。

In some areas, open scanners are available. This scanner is open on the sides. So you won\'t be completely surrounded by the machine. However, the pictures may not be as good as with closed scanners. 

某些地区使用开放式扫描仪。开放式扫描仪两侧开放，所以患者不会完全被机器包围。但是，其所拍摄的图像可能不如封闭式扫描仪。

For either type of scanner, a technologist will operate it from the next room. You will be able to talk to each other through a two-way speaker. 

不管何种扫描仪，技术人员均将在隔壁房间操作仪器。你们可以通过双向对讲机交谈。

During the scan, magnets in the machine will create a strong magnetic field. This will not harm you. Then the scanner will send radio waves through your body. This will not harm you. When the radio waves are turned off, the scanner will pick up energy signals from your body. These signals are used to make the pictures. 

扫描期间，机器中的磁铁会产生强磁场。但是，患者不会受到伤害。然后，扫描仪通过人体，发送无线电波。同样，人体也不会受到伤害。当无线电波关闭时，扫描仪将收集人体的能量信号。这些信号用于形成图像。

During the scan, you will have to stay very still, so the images will be clear. You may be asked to hold your breath for a short time. MRIs may take 30 to 45 minutes or longer to complete. In some cases, you may get contrast dye with your MRI. The dye helps make clearer pictures. 

扫描期间，患者将保持不动，这样所获取的图像才会清晰。技术人员将要求患者屏住呼吸。MRI可能需要30~45分钟或更常时间才能完成。某些情况下，可能行对比造影MRI，颜料有助于形成更清晰的图像。

After the MRI, you can resume your normal activities. If you received contrast dye, the technologist may ask you to drink plenty of water or other healthy drinks to help your kidneys remove the dye from your body.

MRI检查后，患者可以恢复正常活动。如果患者接受对比造影，则技术人员可能要求其摄入大量水或其他健康饮品，以帮助肾脏将颜料排出体外。