MRI (Magnetic Resonance Imaging) is well-suited for obtaining highly detailed pictures of soft tissues, including the brain, the heart, spinal cord, muscles, tendons and joints. MRI has the ability to differentiate between tissues that are similar in density. BRMC has a 1.5 Tesla short bore MRI which gives it the appearance of an open MRI.
The human body is primarily made up of fat and water, which contain many hydrogen atoms. These atoms each carry a magnetic resonance signal. MRI measures these signals using radio waves and magnetic energy to capture cross-sections or image slices of the body. By switching the radio signal on and off, the energy is absorbed by atoms in the body then reflected back out.
Unlike some other imaging devices, MRI can acquire pictures in four different planes of orientation:
- Axial: Dividing the tissue top and bottom
- Coronal: Dividing front and back
- Sagittal: Dividing right and left
- Oblique: Dividing at an angle
Getting Ready For Your MRI
You will need to remove any metal from your person, including credit cards as the magnetic strip on the back can interfere with MRI signals.
Upon arrival for your exam, you may be asked to remove your clothing and put on a gown. To improve the quality of the images, a contrast agent (a liquid substance that enhances the images) may be administered. Gadolinium, an intravenously administered contrast agent, is usually given midway through the exam.
The Test
Your technologist will position you on the MRI table, making sure that the area of interest is placed in the middle of the scanner. The MRI image is to be of your head, a padded helmet will be placed over your head during the procedure.
Your technologist may ask you to hold your breath for up to 5 seconds as the abdomen or chest is being scanned. This helps avoid a blurred image.
While the scanning is being conducted, you will hear several thumps or knocks. This is normal.
Depending on the type of exam being done, an MRI can last from a few minutes up to a full hour.
After the Test
After our MRI is complete, you can return to your normal activities.
