Magnetic resonance imaging, or MRI scan, is an imaging technology that helps doctors diagnose or monitor patient conditions and injuries. MRIs create images of soft tissues in the body, like ligaments, tendons, muscles, and cartilage. Your orthopedist may recommend an MRI to better visualize an injury and determine how best to treat or manage it.
How Does an MRI Work?
An MRI works by using magnets to produce a magnetic field. When in the machine, the protons inside your body’s atoms align with that magnetic field. The machine then sends a radiofrequency pulse through your body, pulling the protons out of alignment.
When the pulse is turned off, the machine detects energy released by the protons as they realign with the magnetic field. It also measures the time it takes for the protons to realign. This information varies depending on tissue type and creates an image of the tissues in your body.
To get this information during an MRI scan, you will be situated within the machine and asked to remain as still as possible.
What Is the Difference Between an MRI Scan and CT Scan?
A CT (computed tomography) scan is another imaging technique many physicians use to diagnose patients. Instead of a magnet, a CT scan utilizes X-rays, a type of ionizing radiation. It takes a series of X-rays around the body, creating a three-dimensional image.
Both types of imaging scans require you to remain still inside the machine. Both create detailed images. A CT image provides better spatial resolution. An MRI image shows more contrast. CT scans are generally better for imaging bones, while MRIs provide better soft tissue imaging.
How Do You Prepare for an MRI?
Your doctor will tell you what to do to prepare for an MRI. They need to know your medical history to help you prepare or determine if you are not a good candidate for an MRI scan. They can also help you prepare appropriately if you have anxiety or claustrophobia.
Most patients can continue to eat, drink, and take medications before an MRI. Your doctor will tell you if you need to fast for some time or stop taking any medications. You may be directed to avoid using personal products, like lotion or deodorant, before the scan. You will also need to take off any jewelry or other items with metal that will interfere with the magnet.
Is an MRI Scan Painful?
Getting an MRI scan is not painful at all. Some people find it uncomfortable to remain still or become anxious when inside the machine. You may find the loud noises the machine makes are uncomfortable, but you can use earplugs during the scan.
Is an MRI Safe?
MRI scans are generally safe and low-risk. Unlike a CT scan, MRIs do not use harmful ionizing radiation. There are no side effects of being exposed to the magnetic field in an MRI.
Inform your doctor of any metal you have inside your body, such as a pacemaker or joint replacement implant. The magnetic field can interfere with these or even cause them to move.
How Long Does an MRI Take?
The duration of the scan depends on the area of your body being scanned. A full body, brain, or spine scan can take up to an hour. Scans of specific areas, like the joints, often only take 30 to 45 minutes.
How Long Does It Take To Get MRI Results?
The results of your MRI scan may take one to two weeks to arrive. You will then make a follow-up appointment with your orthopedist to discuss the results.
How Much Does an MRI Cost?
The cost of an MRI varies significantly by the type of scan, the area of the body scanned, where you get the scan, and your insurance coverage. Talk to your healthcare provider before the scan to discuss pricing. Check with your insurer to find out about coverage. Without insurance, the cost of an MRI can range from a few hundred dollars to several thousand.
An MRI scan is a safe, low-risk way to diagnose and assess injuries and conditions related to soft tissues. Contact EmergeOrtho-Foothills Region to make an appointment for a consultation with an orthopedist for an MRI scan.
