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How To Prepare For Your MRI
Magnetic Resonance Imaging (MRI) is a really effective diagnostic tool. However, if you've never had an MRI before, the process can seem a little intimidating. You may be surprised to hear that many patients who are nervous about getting an MRI end up finding it very relaxing. Some patients even drift off to sleep.
MRIs are a very routine and safe procedure, and there's no need to worry. They don't involve any radiation, and the technology has come a long way, making the experience more comfortable than ever. Your MRI technologist will be with you at every step to make sure you feel confident and at ease. They'll walk you through exactly what to expect from start to finish. Whether it's helping you understand the noises the machine makes or making sure you are comfortably positioned.
However, if you are really claustrophobic, let your physician know. They can prescribe a mild sedative, suggest breathing techniques, or schedule your scan on an open MRI. Just know that MRI technologists have extensive training to help patients with claustrophobia get through the process.
What Is Magnetic Resonance Imaging (MRI)?
An MRI, or Magnetic Resonance Imaging, is a way for doctors to look inside your body without surgery. MRI uses a strong magnet, radio waves, and a computer to create clear pictures of your organs, muscles, and nerves. Unlike X-rays or CT scans, MRIs do not use radiation. So they're safer if you need more than one image over time. Here's how it works:
Your body is made up mostly of water, and water is made up of tiny particles called hydrogen protons. These protons are like little magnets themselves. When you go into the MRI machine, it uses a really strong magnet to line up all of those protons in the same direction. Once the magnet lines them up, the machine sends out special radio waves that interact with these protons. When the radio waves stop, the protons send out signals that bounce back. The MRI machine picks up the signals from the protons and sends them to a computer, which then turns the signals into pictures of the inside of your body. Radiologists then use these detailed images to check for problems like issues with your brain or spine, injuries to muscles and joints, tumors, or problems with your blood vessels.
What Is A Contrast Agent, And Why Do You Need It?
Sometimes, to get really good images, your MRI scan will require a contrast agent. A contrast agent is an inert, safe substance that helps make certain parts of your body easier to see in an MRI. It's like adding a bit of color to a photo to make certain details stand out. For MRIs, the most common contrast agent is gadolinium. Gadolinium works by changing the magnetic properties of tissues so the MRI machine can create clearer pictures, helping doctors see the difference between healthy and abnormal areas.
Gadolinium contrast is especially helpful for spotting things like tumors, inflammation, blood vessel problems, and conditions like multiple sclerosis. While it's generally safe, doctors are extra careful when using it for patients with severe kidney issues because there's a small risk of a condition called nephrogenic systemic fibrosis (NSF).
What Happens During An MRI?
Getting an MRI scan is pretty straightforward. Here is what you can typically expect:
Before The MRI: When you arrive at the clinic, you'll first check-in and fill out any necessary paperwork. You'll change into a hospital gown and remove anything with metal, like jewelry, watches, and sometimes even clothing with zippers or buttons. Please know that metal can interfere with the MRI machine. If you're getting a contrast injection, the nurse will explain it to you and may start an IV.
Getting Ready: Once you're all set, a technician will lead you to the MRI room. You'll lie down on a padded table, and they'll position you so that the part of your body being scanned is centered in the MRI machine. If you're getting a scan of your brain or spine, they may secure your head or body with straps or a cushion to keep you still.
The Scan Starts: After you're comfortably positioned, the table will slowly move you into the MRI machine. It's a large, tunnel-like machine, and you might feel a little closed in but don't worry, the machine is open at both ends, so you won't be stuck inside. Once you're inside, the technician will leave the room but stay in contact with you through a speaker.
During The Scan: The MRI machine will start making a series of loud knocking or thumping noises. These sounds come from the magnets and the radio waves working to get detailed images of your body. You'll need to lie very still during the scan to make sure the pictures are clear, but you can breathe normally. If you need a break, just let the technician know. They can stop the scan for a moment if needed.
Contrast Injection (if applicable): If you're getting a contrast agent (like gadolinium), the technician will give you an injection through your IV. You might feel a brief cool sensation or taste something metallic in your mouth, but it's completely normal. The contrast helps highlight certain areas in your body, making it easier for the doctor to spot issues like tumors or blood flow problems.
The End Of The Scan: The MRI process typically takes between 20-45 minutes, depending on what part of your body needs imaging. Once the technologist completes the scan, the table will move you out of the machine. The technician will check the images, and you may have to wait briefly to see if any additional images are needed.
After The MRI: Once the MRI is complete, you'll be free to change back into your clothes. If you had an IV for contrast, the nurse will remove it, and you can go about your day as usual. If you had contrast injected, it's important to drink plenty of water to help flush it out of your system.
That's it! The whole process is simple, quick, and painless.
MRI Preparation Checklist For Patients
If you have an upcoming MRI, here is a checklist to keep you prepared for every step of the process:
What To Do The Day Before Your MRI
Double-check the date, time, and location of your MRI.
Follow any guidelines given by your doctor or imaging center. Or technologist.
Inform your provider if you have a pacemaker, aneurysm clip, cochlear implants, shrapnel, or any other metal in your body.
If contrast is needed, discuss any allergies or kidney issues with your doctor.
Some MRIs (especially abdominal and pelvic scans) require fasting for 4–6 hours. Follow specific guidelines from your provider, or you may be required to perform an enema.
Drink plenty of water unless advised otherwise.
If you experience anxiety in enclosed spaces, ask your doctor about mild sedation or an open MRI option.
If you're receiving sedation for claustrophobia, you'll need someone to drive you home.
What To Do The Day Of Your MRI
Wear loose, metal-free clothing. Avoid bras with underwire, zippers, or metallic embroidery.
Take off jewelry, piercings, hearing aids, glasses, dentures, and hair accessories.
Some cosmetics contain metal particles that can interfere with the scan.
Plan to arrive at least 30 minutes before your appointment to complete the paperwork and preparations.
Unless told otherwise, continue taking your usual medications.
Empty your bladder before the scan, especially for long procedures.
Inform them if you are pregnant, have medical implants, or experience anxiety.
Stay still as possible during the scan as movement can blur images, requiring a repeat scan.
What To Do After Your MRI
Most patients can immediately return to daily routines.
Drink water to flush the gadolinium from your system.
Mild nausea or dizziness from contrast is rare but possible. If you experience any unusual symptoms from contrast, contact your doctor.
Retrieve any jewelry, glasses, or hearing aids before leaving.
Your doctor should receive results within 24–48 hours. Call their office if you haven't heard back within a few days.
How Long Does An MRI Take?
Fortunately, most MRIs are pretty quick. However, the time it takes for an MRI depends on the body part, how many images your physician needs, and whether a contrast agent is needed. On average, the MRI procedure lasts between 15 and 90 minutes. If you're having a scan of your brain, spine, or joints, it'll take between 15 to 60 minutes. However, more detailed scans, like those of your abdomen or heart, might take up to 90 minutes. If the MRI technologist uses contrast, the process can take around 15 to 30 minutes for additional imaging sequences.
What Are The Risks Of MRI?
MRIs are a safe, non-invasive way to get a close look inside your body, but there are a few things to keep in mind.
Metal Hazards: The strong magnets in the MRI machine can interact with metal implants, pacemakers, or aneurysm clips, so it's important to inform your doctor if you have any of these.
Claustrophobia And Discomfort: Some people feel anxious or claustrophobic inside the MRI machine. If that's you, there are open MRI machines or options for mild sedation to help you feel more comfortable.
Gadolinium Contrast Risks: Gadolinium-based contrast agents are generally safe but, in rare cases, may cause allergic reactions or, in people with severe kidney issues, a condition called nephrogenic systemic fibrosis (NSF).
Hearing Sensitivity: The MRI machine makes loud knocking noises, but you can wear earplugs or noise-canceling headphones to block out the sound.
Pregnancy Considerations: MRIs are usually avoided during the first trimester unless absolutely necessary, as there are no confirmed risks to fetal development, but it's always best to discuss any concerns with your doctor.
When Do I Get The Results Of My MRI Scan?
Typically, you'll get your MRI results within 24 to 48 hours, though it can vary depending on the complexity of your scan and the facility's workload. A radiologist reviews the images, writes a detailed report, and sends the report to your doctor, who will then go over the results with you. In emergencies, results may be available much sooner, sometimes within just a few hours.
Will My Insurance Cover MRI Testing?
Most health insurance plans, including Medicare, private insurers, and auto insurance (PIP), will cover MRI scans if they're medically necessary, but there are a few things to keep in mind:
Medical Necessity: Your doctor must explain why you need the MRI for diagnosis or treatment.
Pre-Authorization: Many insurance companies require approval before you have an MRI, so make sure to check if this is needed.
Deductibles And Copays: Your costs will depend on your insurance plan, and out-of-pocket expenses may be higher if you go to an out-of-network facility.
Contrast Vs. Non-Contrast: Some insurers cover standard MRIs but require extra approval for those that use contrast agents.
Government Insurance: Medicare and Medicaid coverage vary based on where you live and the medical condition being treated.
It's a good idea to contact your insurance provider before scheduling your MRI. If you need insurance pre-authorization, your doctor or your imaging center will help with your paperwork.
Don't worry about getting an MRI. It's a very straightforward and non-invasive procedure. Plus, our experienced radiology staff will be with you every step of the way. We'll guide you through the process, explain what's happening, and answer any questions you have. Whether it's your first MRI or you've had one before, it's a simple, painless experience, and we're here to help you feel confident and at ease. Just relax, and we'll help you get the answer you need for your health.
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