What is an MRI scan?
MRI means "Magnetic Resonance Imaging". It is an imaging technique using a strong magnetic field to produce high-quality pictures of the internal structure and function of your body. It is very useful for looking at soft tissue structures, such as muscles and ligaments.
Is it safe?
MRI has been used for over 25 years in this country, and there are no known side effects.
Due to the magnetic field, safety is very important. To make sure you are safe to have an MRI scan, you should contact us if you answer "yes" to any of the following:
- You are pregnant or may be pregnant.
- You have a cardiac pacemaker.
- You have had any type of heart surgery.
- You have a cochlear implant, neurostimulator, or programmable hydrocephalus shunt.
- You have any metal implant in your body.
- You have had an injury to your eyes involving metal or metal fragments.
- You have had any operations on your head, eyes, ears or spine.
Who will I see?
You will see a small team of radiography staff who will care for you during your visit.
Do I need an injection?
For some examinations we may need to give an injection of a dye (a contrast medium) into a vein. For prostate scans, however, we use imaging sequences that do not require an injection, so you will not receive any injections during the study.
Before the scan
We will ask you some safety questions when you book your appointment, and you will need to fill in a safety questionnaire that we will send you with your appointment letter. Please remember to bring this with you to your appointment.
Unless we let you know otherwise, you do not need to make any special preparations and you can continue to eat and drink as normal and take any prescribed medicine.
Gas within the rectum (back passage) can make the prostate harder to assess, so it is important that you try to go to the toilet before the study, empty your bladder and bowel, and pass as much wind as possible.
There are a few simple instructions to follow before the scan:
- Come dressed in clothes without zips or metal buttons if you can.
- Leave any valuable possessions, such as jewellery or watches, at home.
- Arrive 10 minutes before your appointment.
- Tell us about any special circumstances, for example if you need wheelchair access, if you are hard of hearing, if you have poor eyesight or if you are claustrophobic.
What happens during my appointment?
- When you arrive you should go to the reception.
- The radiographer or another member of staff will meet you and explain the procedure to you. We will check your safety questionnaire once more.
- We may ask you to change into a gown. If you need to change, your clothes and personal items will be kept in a secure place.
- We will direct you to the toilet in the department so you can go before the study.
- You will be asked to lie down on the MRI bed and we will make you as comfortable as possible. The radiographer will move you into the scanner. You will be asked to stay as still as possible and you will be given either ear defenders or ear plugs to wear because of the scanner noise.
- The examination is made up of a series of scans, with a short pause between each one, and the radiographer will talk to you between scans.
- If you have difficulty or any discomfort during a scan you will be able to use an emergency call bell.
Will it be uncomfortable?
We will make you as comfortable as possible. You will hear some loud mechanical sounds from the scanner, which is completely normal.
How long will it take?
Our standard prostate scans take around 30 minutes, but occasionally we need to repeat some sequences, which can add five or ten minutes.
After your scan
- You can eat and drink normally.
- You can drive home afterwards and return to work if you need to.
Are there any side effects?
There are no known side effects from having an MRI scan.
When will I get the results?
A radiologist will check and report your scan shortly after your appointment and will send a report to your doctor or consultant. At the time of your appointment you will be told how long this should take.
If a follow up appointment is not already arranged, you will need to contact the referring doctor or consultant to make an appointment to get your results.
Can I bring a relative or friend with me?
Yes, but they will only be allowed into the scan room in special circumstances (for safety reasons) and only after they have filled in a questionnaire which shows that they are safe to enter the magnetic field.
Children will not be allowed into the scan room while you are having the scan, so you will need to make arrangements for them before you come to your appointment. Staff are unable to assist with supervision.
Contacting us
If you need any more information, please call the imaging facility on 01792 606 420, or the number on your appointment letter.
This guide is the imaging facility's own patient information. If anything here differs from your appointment letter, follow the letter and call us if you are unsure.
Other guides
Before your appointment
What an MRI scan is, the safety questions we have to ask, how to prepare and what happens on the day.
Read the guide →CTWhat a CT scan involves, the preparation some scans need, and what happens on the day.
Read the guide →CT of the heartPreparing for a CT scan of the heart: medication, caffeine, and what happens on the day.
Read the guide →Contrast extravasationWhat to do at home if the contrast injection leaked into the tissue around the vein, and what to watch for.
Read the guide →Questions before your scan?
Call the imaging facility in Swansea, or the number on your appointment letter.