Magnetic Resonance Imaging (MRI) is a very powerful medical imaging modality. It uses strong magnets and radio-frequency waves to create detailed images of the internal structures of the body. Unlike X-rays or CT scans, MRI provides highly detailed images without using radiation, making it a valuable diagnostic tool for various disease conditions.
As MRI adoption increases, it becomes imperative to answer some frequently asked questions, as well as safety which is very important in MRI. Here are some frequently asked questions to help you prepare for your next MRI Examination:
How does an MRI work? #
Unlike X-rays or CT scans, MRI uses magnets and radio waves rather than radiation to produce images. These images are exceptionally clear and provides us with a lot of details, making diagnosis easy.
What conditions can an MRI detect? #
MRIs are particularly effective for examining soft tissues and organs, such as the brain, heart, spinal cord, and muscles. Most conditions range from cancer, neurological disorders, to heart diseases and a lot more.
Why is an MRI better than other scans? #
While each imaging modality has strengths and weaknesses, MRI is especially known for its detailed images of soft tissues, which can reveal abnormalities or conditions that might not appear on other scans.
What is the difference between an MRI and a CT scanner? #
An MRI machine is typically longer and more cylindrical, while a CT machine is shorter and doughnut-shaped. MRI uses a strong magnetic field and radio waves to create images, whereas CT scans rely solely on ionizing radiation.
Do these imaging modalities complement each other? #
Yes, both MRI and CT have their unique strengths, so doctors sometimes use them together for a more complete diagnosis of some conditions. For instance, MRI excels at providing soft tissue detail, while CT scans are faster and more suitable for imaging bone or trauma related conditions (like bony fractures).
Who can benefit from an MRI? #
Anyone needing a closer look at their internal organs or tissues—especially when other scans haven’t provided sufficient information—can benefit from an MRI. It is an indispensable tool in modern medicine for diagnosing various conditions.
Is an MRI safe? #
Yes and No- let us explain!
Actually, MRI scans are generally considered safe. It does not use Radiation which is popularly known to have a potential to damage tissues. However, like every other thing, this safety is not absolute. MRI can be associated with burns, projectile effects, damage and other harms if safety guidelines are not followed.
As a rule of thumb, all persons undergoing an MRI, or having to enter an MRI Room must be screened for safety. Thankfully, the Radiographers, Radiologists, Nurses or Physicians are often trained in this aspect, so you can trust their judgment.
An MRI safety questionnaire will be administered before your MRI scan. Ensure you provide your radiographer with all necessary medical/implant history to ensure your scan is safely carried out. Refer to our MRI Safety page for more details on this.
How should I prepare before my MRI? #
Usually, you can eat and drink normally before an MRI, unless instructed otherwise (such as for specific abdominal scans). In all, practices may vary, so don’t find it surprising if fasting is recommended, although drinking water is generally fine.
Do I stop taking my medication? #
No, you should continue your regular medications, including prescribed painkillers, as it’s important to be comfortable during the scan. If you’re unsure, consult your doctor to confirm if any medications need to be adjusted.
What happens when I arrive for my MRI? #
When you arrive, you’ll complete a short questionnaire about your health and relevant medical and surgical history to ensure the scan can proceed safely. You’ll also be asked to provide a signed consent for the scan.
Should I bring anything with me? #
You don’t need to bring much. Any personal belongings, like jewelry and watches, can be stored in a locker provided by the facility. If you had a previous study that may be relevant to your current study done in another MRI Centre, a copy of your reports, films and relevant data will help.
What will I wear for my MRI? #
You’ll be given scrub pants and a gown to wear during the MRI exam, so you don’t need to worry about your clothing.
What will I need to remove before the scan? #
You’ll need to remove all metal items, such as jewelry, watches, and hairpins, as metal can interfere with the MRI machine. If you have piercings, hearing aids, or dentures, those will also need to be removed, and you’ll be given a secure place to store them during the scan.
How long will my MRI scan take? #
MRI scans typically last between 30 and 90 minutes, depending on the area being examined. You’ll need to stay as still as possible for clear images, though you can move slightly between image sequences, which only last a few minutes each.
Will the scan be painful? #
No, an MRI is expected to be painless and non-invasive. However, you might feel discomfort from lying still for a long time, but the scan itself should not cause you pain.
What happens during my MRI? #
You’ll be taken to the MRI room, where you’ll lie down on a table that slides into a long tube-shaped machine. Some examinations require specific body areas to be covered with MRI coils for the highest quality images. Try to lie as still as possible to ensure clear images.
People speak of it being Loud, Will the machine be noisy? #
Yes, the MRI machine can be quite loud, making knocking or buzzing sounds. This noise is normal and results from the switching of electric currents within the scanner coils. Usually, earplugs or headphones are provided to reduce the effect, and you may even be able to listen to music.
Can I talk during the scan? #
Yes, you can communicate through an intercom system which is usually available. If you feel uncomfortable, you can speak up in between the scans, and the Radiographer should respond right away. Ensure you confirm this with your Radiographer before the MRI is started.
Should I worry about feeling trapped during the MRI? #
This fear is known as Claustrophobia. It is fairly common and normal, so don’t beat yourself over it. The experience of claustrophobia is largely traceable to the machine’s design.
Due to this, many centers provide a buzzer for you to hold, allowing you to alert the staff if you feel uncomfortable. Proper communication with the attending Radiographer, having a relative present with you during your scan or using alternative machine options, like a Wider-bore or Open-bore MRI, can also help.
Can I take medication to help with anxiety or claustrophobia? #
Yes, sedation is an option if you’re anxious or claustrophobic. However, you’ll need to arrange this with your doctor ahead of time and have someone accompany you afterward, as you may need assistance due to the effects of sedation.
Are there any restrictions after the MRI? #
No, you can return to normal activities right after your MRI. There are no side effects, so you can resume work, eat, and exercise as usual.
Conclusion #
MRI is a safe and rapidly explored (particularly in Africa) for diagnosis of various disease conditions. By following our guidelines, preparing properly and communicating openly with your radiographer, you can ensure a comfortable, stress-free experience.
If you have any concerns, feel free to discuss them with your healthcare provider or managing physician to ensure you’re well-informed for your scan.