Contrast agents, which are sometimes given as part of the scan, will only be given if a Radiologist decides this is right for you.

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Short bursts of radio waves are then sent into the body, knocking the protons out of alignment. When the radio waves are turned off, the protons realign. This sends out radio signals, which are picked up by receivers.

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When you arrive for your scan, you’ll be asked to fill in and sign a questionnaire about your health and medical history. This helps to ensure that it’s safe for you to have the scan.

If you decide to have a sedative during the scan, you’ll need to arrange for a friend or family member to drive you home afterwards, as you won’t be able to drive for 24 hours.

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MRI scans may not be recommended for patients with certain implants or foreign bodies. If you have any metal in your body, you should tell the person referring you for the scan,. This can then be looked into before your scan.

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There’s no evidence to suggest MRI scans pose a risk during pregnancy. However your specific case will be reviewed by the clinical team looking after you to decide whether an MRI scan is right for you.

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You’ll be able to talk to the Radiographer through an intercom. They’ll also be able to see you throughout the scan via a television monitor and a viewing window.

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Most implants can be scanned safely using MRI. However, it’s important that the Radiology department are aware of them. This means they can check whether any adjustments need to be made to ensure the scan is safe for you.

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Modern MRI scanners have a wider tunnel, which helps reduce claustrophobia. If you’re claustrophobic you should tell the Radiographer. They’ll be able to support you during your scan. Going into the scanner feet first may be easier for claustrophobic patients, although this isn’t always possible.

An MRI scan is a painless and safe procedure. Extensive research has been carried out into whether the magnetic fields and radio waves used during MRI scans may pose a risk to the human body. No evidence has been found to suggest there’s a risk, which means MRI scans are one of the safest medical procedures available.

MRImachinepartsand functions PDF

If you don’t need to wear a gown, you should wear clothes without metal zips, fasteners, buttons, underwire (bras), belts or buckles.

As the MRI scanner uses strong magnetic fields, it’s important to remove any metal objects from your body. These include:

These signals provide information about the exact location of the protons in the body. They also help to show the difference between types of tissue in the body. This is because the protons in different types of tissue realign at different speeds and produce distinct signals.

Having something metallic in your body doesn’t necessarily mean you can’t have an MRI scan. However, it’s important that the medical staff carrying out the scan are aware of it.

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Why would a doctor order anMRI

MRIscan side effects

The MRI scanner has powerful magnets. This means that when you lie inside it, the protons in your body line up in the same direction. This is similar to when a magnet pulls the needle of a compass. You will not be able to feel this happening.

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Some patients occasionally experience a tingling sensation or feel hot from being in the MRI scanner. These effects only last a short while and should ease as soon as the scan is over.

MRItest

In some cases, you may be asked not to eat or drink anything for up to 4 hours before the scan. Other patients may be asked to drink quite a large amount of water beforehand. This depends on the area being scanned.

If you’re claustrophobic, you can ask for a mild sedative to help you relax. You should ask your GP or consultant well before having the scan.

You’re usually able to listen to music through headphones during the scan if you want to, and in some cases you can bring your own CD.

Magnetic resonance imaging (MRI) is a type of scan that uses strong magnetic fields and radio waves to produce detailed images of the inside of the body.

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You should avoid bringing valuables along with you to your MRI scan. However, any valuables you do bring can usually be stored in a secure locker.

You should let the staff know if you have a history of allergic reactions or any blood clotting problems before having the injection.

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Your MRI scan needs to be studied by a Radiologist (a doctor trained in interpreting scans and X-rays). It may also need to be discussed with other specialists. This means it’s unlikely you’ll get the results of your scan immediately.

After the scan, you can resume normal activities immediately. If you have had a sedative, a friend or relative will need to take you home and stay with you for the first 24 hours.

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MRIscan cost

At the centre of each hydrogen atom is an even smaller particle called a proton. Protons are like tiny magnets and are very sensitive to magnetic fields.

You should tell the person who is referring you for an MRI scan if you have any metal in your body. You must also tell them if you’re pregnant. This will allow the Radiology department to check whether it’s safe for you to have your MRI scan before you arrive for your appointment.

In some cases, a frame may be placed over the body part being scanned, like the head or chest. This frame contains receivers that pick up the signals sent out by your body during the scan. This can help to create a better quality image.

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An MRI scanner is a short cylinder that’s open at both ends. You’ll lie on a flat motorised bed that moves inside the scanner.

Babies and young children may be given a general anaesthetic before having an MRI scan. This is because it’s very important to stay still during the scan, which babies and young children are often unable to do when they’re awake.

On the day of your MRI scan, you should be able to eat, drink and take any medication as usual, unless you’re advised otherwise.

It’s also possible for contrast agents to cause tissue and organ damage in people with severe kidney disease. You may be given a blood test to determine how well your kidneys are functioning and whether it’s safe to go ahead with the scan.

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The MRI scanner is normally operated by a Radiographer, who is trained in carrying out imaging investigations. They control the scanner using a computer. This is in a different room to keep it away from the magnetic field generated by the scanner.

They can decide on a case-by-case basis if there are any risks. They’ll also decide if further measures need to be taken to ensure the scan is as safe as possible. For example, it may be possible to make it safe for a pacemaker or defibrillator to be scanned when certain conditions are met.

At certain times during the scan, the scanner will make loud tapping noises. This is the electric current in the scanner coils being turned on and off. It can be extremely loud and patients have often compared it to standing immediately next to roadworks.

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Some MRI scans involve having an injection of a contrast agent. This makes certain tissues and blood vessels show up more clearly and in greater detail.

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