Magnetic Resonance Imaging

we have the latest mri technology producing high quality Mri images.  our 3t mri is the only one of its kind in the region,  providing our patients a unique & ambient experience.

MRI (Magnetic Resonance Imaging) uses radio waves and a strong magnetic field rather than x-rays to provide clear and detailed pictures of internal structures and tissues i.e. no ionizing radiation.  It requires specialised equipment and expertise, allowing evaluation of some body structures that may not be visible on other imaging methods.  MRI images are so precise that doctors can often get as much information from MRI as they would from looking at the tissue.  For this reason, MRI has the potential to reduce the number of tests that a patient needs to undergo to make a diagnosis.

  

HOW TO PREPARE FOR YOUR Mri

  • Prior to an MRI scan you should eat normally and take any medication as usual, unless you were specifically instructed otherwise at the time of booking your appointment.
  • When you arrive for your scan you will be required to complete some questionnaires detailing your medical history, medications taken and previous imaging.
  • The procedure will be explained to you and you will be given time to ask questions at this time.
  • MRI uses a very strong magnetic field that can attract ferromagnetic objects. Some implants in the body might need us to investigate it further so you will be asked whether you have any prosthetic joints, aneurysm clips in the brain, a pacemaker or artificial heart valve, stents, IUD (intra-uterine device) or metal plates, pins, screws, or surgical staples. You will be asked if you have ever had a bullet or shrapnel in your body, or have ever worked with metal and may have metal fragments in your body, particularly your eyes. Sometimes an eye x-ray is needed before the MRI exam.
  • You will be asked to remove any metallic objects such as jewelry, hairpins, glasses, clips, hearing aids and non-permanent dentures.
  • Tooth fillings, braces or a metal wire behind the teeth are generally not affected by the magnetic field, but they may distort images of the facial area or brain, so the Tech should be aware of them.
  • If you are pregnant, you should inform staff. Although there is no evidence that a hazard exists for pregnant women, it is best not to take chances. In some cases an MRI scan may be recommended in pregnancy since it is safer than x-rays or a CT scan.
  • On arrival for the scan you will be greeted by the reception staff who will take you to the MRI waiting area. Tea, coffee and hot chocolate are available if you would like one, although generally not until after your scan. A MRI Radiographer or a Clinical Care Assistant, will then collect you to change into a gown.

 

WHAT HAPPENS DURING YOUR EXAMINATION

  • The staff will help you onto the scanning table, and you will be positioned head or feet first, depending on your examination. The scanning table will slide into the magnet so the body part under examination is in the middle of the scanner.
  • You will need to keep absolutely still during the scanning process to avoid “blurry” images. You will be given a call-bell to ring in case you need the attention of the MRI Radiographer. If you need to cough, sneeze or move, the tech can pause the scan.
  • The MRI Radiographer will leave the room during the scan, but can see you and will communicate with you through an intercom. During the scan you might get warm as your body absorbs radio waves. The heating is dependent on your weight and the scan duration.
  • Some patients may find it uncomfortable to remain still during the examination, so please take your pain medication before you come in for the MRI.  Others experience a feeling of being “closed in” or claustrophobic. Our MRI scanner at the Broadway site has a bigger bore than at the our scanner situated on the Palmerston North Hospital site, so please tell us if this is the case so we can book you at the appropriate MRI location.
  • During the scan you will hear some peculiar noises:
    • The hum of the machine
    • Some thumping, whirring, grating and other machine-like noises.
    • You will be given earplugs, earmuffs or both to help with this.
  • Depending on the part of the body being examined, a contrast material may be used to enhance the visibility of certain abnormal tissues, blood vessels or infection. This is usually administered partway through the examination through a small needle inserted into the arm or the back of the hand. Some examination will definitely need the contrast e.g. ALL breast and prostate MRI’s.
  • When the scan is completed, the MRI Radiographer or Clinical Care Assistant will remove your cannula (if present) and you can get dressed

 

AFTER YOUR EXAMINATION 

  • Once we’re finished with the scan, the images will be reported by one of our onsite Radiologists. We will send the results to your GP and referring specialist. 

 

 

For any questions you may have before or after your examination, please Contact Us.  

 

 

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