Magnetic resonance imaging (also known as MRI) uses a magnetic field and radio waves to produce pictures of organs, tissues, and structures inside your body. An MRI can help doctors make a diagnosis and recommend the best treatment options for a condition. You don't have to do much to prepare for a magnetic resonance imaging (MRI) exam, but knowing what to expect can help you feel better prepared for the exam.
Step
Part 1 of 2: Preparing for the Examination
Step 1. Tell your doctor if you have claustrophobia
During an MRI scan, you will be in a closed, tube-like machine for up to an hour. If you are claustrophobic, this experience can cause a lot of anxiety, and you may need to take a sedative before the test if you feel anxious. Talk to your doctor about your claustrophobia before the exam to see if he or she can prescribe a sedative for the procedure.
Step 2. Tell your doctor about any metal implants you have
Certain metallic implants can affect an MRI scan. Tell your doctor about the implants you have before the exam.
- Cochlear (ear) implants, clips used for brain aneurysms, metal coils inserted into blood vessels, any type of cardiac defibrillator or pacemaker generally indicate that you cannot be placed in an MRI machine.
- Some metal implants pose a number of risks to health and safety as well as the accuracy of the inspection. However, depending on how long the device has been in place prior to the examination, the following devices may still make the examination safe: artificial heart valves, drug infusion line implants, metal prosthetic limbs or joints, nerve simulator implants, metal pins, screws, plates, tubes, and surgical staples.
Step 3. Tell your doctor about any health concerns
Certain health issues must be taken into account before you have an MRI. Talk to your doctor about safety if you have any of the following conditions:
- Pregnancy
- History of kidney problems
- Allergy to iodine or gadolinium
- History of diabetes
Step 4. Take the medicine as usual
Before having an MRI, take your medications as you normally would before the exam unless directed otherwise. You should try to keep your schedule as normal as possible ahead of the MRI exam.
Step 5. Know what to expect
Reading about what happens during an MRI exam can help relieve anxiety about the procedure. Learn what to expect in the days leading up to the examination.
- An MRI is a large tube with holes on each side. You'll be placed on a table that moves into the tube, while the technologist watches you from another room.
- Magnetic fields and radio waves will produce internal readings of your body, which are used to detect things like brain tumors, chronic conditions, and other disorders. However, this procedure is not painful because you will not feel the magnetic field.
- The MRI machine makes a lot of noise during the procedure. Many patients choose to bring earplugs and listen to music or audio book recordings during the process.
- The duration of the examination varies, but some can feel quite long. Sometimes it can take up to an hour for an inspection to complete.
Step 6. Follow any specific instructions your doctor explains to you
In most cases, you will continue with your usual schedule without making any changes. However, if you have certain health problems, your doctor may suggest changing your medication, diet, or sleeping habits before the exam. Follow any directions your doctor has reviewed with you, then call and ask if you have any questions.
Part 2 of 2: Arriving at the Checkpoint
Step 1. Consider asking a friend or family member to accompany you
If you are being sedated for claustrophobia, you will need someone to drive you to and from the hospital or to make sure you get home safely using public transport or a taxi. Even if you are fully aware of having the procedure done, it is a good idea to have a friend or family member come with you. An MRI is a lengthy procedure and can feel quite dizzying.
Step 2. Come early
You must arrive at the checkpoint 30 minutes early. There will be paperwork for you to fill out and the doctor or nurse will probably need to explain to you the procedure beforehand.
Step 3. Remove any objects that may contain metal
Before an MRI exam, you will need to remove the following objects as they may contain metal:
- All jewelry
- Glasses
- Metallic hair clips/hair clips
- Dentures
- Watch
- Hearing aids
- Wig
- Bra with wire inside
Step 4. Fill out the MRI identification form
Before undergoing the examination, you will be asked to fill out an MRI identification form. This is a 3- to 5-page document containing common questions such as your name, age, date of birth, as well as questions about your medical history. Take the time to read the form carefully and answer all questions to the best of your ability. Ask your doctor or nurse if you have any questions regarding the form.
The form will also include questions about allergies and any reactions you have had in the past to the contrast material used in the imaging procedure. Some MRIs require an intravenous injection of a contrast material called gadolinium, which can cause an allergic reaction in rare circumstances
Step 5. Follow the instructions given to you during the MRI
After filling out the form, you will enter the MRI room. The doctor will ask you to change into a hospital gown. Then follow the doctor's instructions regarding the examination.
- During an MRI, you can hear and talk to your doctor or the MRI technician. In some circumstances, you may be asked to perform simple tasks, such as tapping your fingers or answering some easy questions.
- Stay as still as possible during the procedure. You will be asked to remain still to make sure the image is clear. Just try to breathe normally and stay still.
Tips
- Many MRI clinics will provide headphones and play music of your choice during the procedure. You may want to inquire beforehand to see if this option exists.
- Sometimes, the doctor will ask the patient to avoid certain foods before undergoing the examination. If so, the doctor or nurse will tell you what foods to avoid.
- If you require the services of an interpreter, you must notify the facility when scheduling the inspection.
