Magnetic Resonance Imaging, or MRI, is an advanced, state-of-the-art method of diagnostic imaging, which produces very clear pictures, or images, of the human body without the use of X-rays.  This technology enables physicians to detect developing diseases or abnormalities earlier than ever before.  MRI uses a powerful, but harmless, magnetic field and radio waves, like the kind that transmit your favorite FM music.  The combination of radio waves and magnetic field produces detailed images of body structures such as the brain, the spine, and other vital organs.

 

The human body is made up of millions of atoms, which are magnetic.  When placed in a magnetic field, these atoms line up with the field, much like compass points to the North Pole.

Radio waves, tuned to a specific frequency, tip these tiny magnets away from the magnetic field.  As they tip, they gain energy.  When the radio waves are turned off, the atoms try to realign with the magnetic field, releasing the energy they gained as very weak radio signals.  A powerful antenna picks up these signals and sends them to the computer, which performs millions of calculations to produce an image for diagnosis.

 

A complete MRI exam takes between 15 and 60 minutes.  During this time, several dozen images may be obtained.

 

The MRI exam poses no risks to the average patient if appropriate safety guidelines are followed.  Check out the "Patient Checklist" section which describes these in detail.  If you have any questions regarding the MRI exam, please be sure to discuss them with your doctor.

 

Although MRI is a very advanced medical technique, the MRI exam is probably one of the easiest and most comfortable exams you may ever experience.

 

The technologist will simply ask you to lie down on a cushioned table that will automatically move into the magnet after you have been comfortably positioned for scanning.  The technologist will leave the magnet room but you will be in constant contact with him or her throughout the entire exam.

 

During the MRI scan, you will hear electronic thumping sounds. Just relax - even take a nap - but try to lie as still as possible since any movement during this time will blur the picture.

 

Other than sound, you should experience no other sensation during scanning.  When scanning is complete, the technologist will assist you  in getting off of the table.

To learn more about the MRI exam please take a few moments to view the following educational and safety videos:

Prior to your exam, please review the following checklist:

Please bring previous X-Rays, CT's or MRI's applicable to the exam.  The radiologist may want to review them.  (Ex. If you are having a MRI of the knee, please bring any previous X-rays of your knee.)

If you think you may be claustrophobic, ask your doctor to prescribe medication prior to the exam.  If you do receive medication, please bring someone with you that will be able to drive you home because you will not be able to drive yourself.

 

If you think you may not be able to lie flat on your back without pain for approximately 40 minutes, ask your doctor to prescribe medication prior to the exam. 

You CAN take any medication you may currently be taking.  It is not necessary to stop taking it prior to the exam.  In fact, the exam will be much more comfortable if you continue to take your medication.

You CAN eat and drink prior to the exam.

 

You  CANNOT have the exam if you have any of the following:

Relax and do not worry about the exam!  We will make sure that you receive the quality, professional care that you deserve.

 

 

If you any questions or concerns about MRI, call
St. Joseph's Hospital at (607) 737-7817.