MRI (Magnetic Resonance Imaging)
MRI is one of the most accurate methods of diagnostic imaging available, allowing physicians to view the human body from any angle. Using the latest digital MRI equipment, St. John's diagnostic imaging experts work with enhanced clarity images and faster scanning time for increased patient comfort.
How to Contact Us
St. John's Regional Medical Center in Oxnard and St. John's Pleasant Valley Hospital in Camarillo are fully equipped to handle all of your diagnostic needs.
For more information about St. John's diagnostic services, please call the following:
- Diagnostic Imaging Services at St. John's Regional Medical Center: (805) 983-0883
- Diagnostic Imaging Services at St. John's Pleasant Valley Hospital: (805) 389-5655
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Frequently Asked Questions
Q: What is an MRI?
A: MRI or Magnetic Resonance Imaging, is a state-of-the-art technique that allows doctors to see inside the human body in remarkable detail without using x-rays. MRI images are produced with the use of a powerful magnetic field, radio waves, and a sophisticated computer system. Most single exams take from 45 - 60 minutes, multiple exams ordered will take longer.
Q: Is an MRI safe?
A: The MRI exam is painless and generally safe. Patients will be asked to complete an MRI patient screening form to assure safety before entering the strong magnetic field. The form addresses implantable devices, patient condition, pain, claustrophobia, and current medications. Nursing care is provided to both inpatients and outpatients to support patient care needs.
Q: What is the difference between an MRI and a CT scan?
A: Both MRI and CT scans make cross-sectional images (slices) of most areas of the body using a sophisticated computer system. The major difference is that an MRI uses a large magnet and radio waves to produce images while the CT uses X-rays. MRI is superior when it comes to soft tissue contrast, and there are no known side effects. The ability to view pictures from multiple directions, high tissue contrast, and lack of X-rays make MRI a very powerful and increasingly popular imaging tool. Please note, MRI is very sensitive to motion during the acquisition of pictures and, in some instances, CT is preferable if the patient is unable to hold still.
Q: How do I prepare for my scan?
A: Preparation for your MRI is very simple. We ask that you follow directions from the nursing staff. In some circumstances you may be asked not to eat or drink for a time prior to the MRI. You will be asked to fill out a metal screening form and to remove any metallic objects such as jewelry, glasses, hairpins, hearing aids, and possibly non-permanent dentures. Wallets, credit cards, and purses must also be left behind in a secure place (lockers are provided to secure items in the outpatient areas). Your MRI nurse or technologist will conduct a brief interview with you regarding your medical and surgical history to include the possible presence of metallic objects in your body. It is very important that we know any metal in your body is safe to enter the magnetic field. You may be asked to provide specific documentation (wallet card) on any implanted devices so that we may ensure your safety while in the MRI scanner.
Q: What happens if I have concerns about being able to lay comfortably or remain still during the scan?
A: It is very important that you share this information with your attending nurse and/or ordering physician prior to the scan. They, in turn, can then write the appropriate medication orders to ensure that you are properly cared for during your MRI exam.
Q: What happens during the scan?
A: The technologist and/or the MRI nurse will help you onto a padded examination table where you will be comfortably situated. If your physician has ordered medication to help you complete your MRI, then monitors ( blood pressure cuff, pulse oximeter, etc) may be placed on you so that our MRI nurse can better manage your care. While the machine is taking pictures, you will hear knocking noises made by the scanner which is normal and is no cause for alarm. We will provide you with earplugs to make you comfortable while the scan is making noise. The most important thing to remember is that you must remain very still during the study as motion causes the images to blur. Throughout the test, you will be able to speak to the technologist when the noise stops. Please communicate your needs, should you have any, to the technologist at these times. Most single exams take from 45 - 60 minutes, however we will spend the time needed to obtain a diagnostic exam while keeping you comfortable.
