MRI Scanning
What is MRI?
MRI stands for Magnetic Resonance Imaging, an imaging technique used to visualise the soft tissue inside your body.
How does MRI work?
The MRI machine is basically a large ring shaped magnet with a very high magnetic field strength. MRI combines a powerful magnet with radio-frequency pulses. These collect signals that are then processed by a sophisticated computer to form pictures of the inside your body.
When are MRI scans used?
MRI is used for the investigation of the entire body from slipped discs to brain tumours, from painful or injured joints to assessment of blood flow in blood vessels; from gynaecological problems to breast disease; from kidney transplants to the function of the heart and for the diagnosis and planning of treatment for cancer.
What do I need to do before my MRI scan?
Before your scan you MUST FILL OUT A SAFETY QUESTIONNAIRE. Due to the powerful magnet that is used in MRI, not all patients can be scanned - such as those with surgical clips, a pacemaker or metal fragments in the eyes. If you are concerned please contact our team before your scan appointment.
Unless you are told otherwise, no special preparation is needed for your scan and you may continue to eat and drink as normal and take any prescribed medicines. For some types of scan you will need to drink a special liquid which contains elements which allows better visualisation of some organs. It is helpful if you can come for your scan in clothing that has no metal parts, such as hooks or zips. If this is not possible, then you will need to change into a hospital gown.
What will happen during your scan?
For your scan, you will lay down on a comfortable scanning bed that will slowly move through a doughnut shaped ring called a gantry into the middle of the magnet. You will experience no discomfort or pain, but will hear quite loud mechanical sounds from the scanner.
If we are examining your legs then much of your body is outside the magnet. Otherwise it will feel as if you are lying in a small tunnel. Some may find this a little claustrophobic but we can help you cope with this. You can listen to music, wear special glasses to allow you to see more of the room or close your eyes and listen to the beat of the machine. As noted previously the machine is quite noisy. As the magnetic field changes the noise may vary from a light tapping, through to a sound like a pneumatic drill.
The radiographer operating the scanner can both see and hear you throughout the procedure so if you have any concerns, you only have to say. You can expect to be in the scanner for between 20 and 40 minutes.
Will I be magnetic afterwards?
No, the magnetic field only lasts while you are in the room.
What happens after the scan?
The results of the scan will be analysed by a radiologist who will provide your doctor with a comprehensive report. Your doctor will then discuss the findings of the report with you and plan any treatment or next steps.
What is the cost?
For a self-funding patient an MRI scan will cost £395.