NSCLC scans and monitoring

What is it, and how does it work?

MRI scans use magnetism and radio waves to create a detailed picture of your body.⁴ MRI scanners are large machines with a tube running through them – the inside of the tube is where the scan takes place.

Before the scan begins, you may need to have a special dye injected into your body to help make the scans even clearer.⁴

You will then lie flat on a motorised bed, which will slowly move you into the machine until the part of your body that is being scanned is in the centre.⁴ You’ll stay in the machine for around 20–30 minutes, and a radiographer will be on hand to support and talk to you from a nearby room.⁴

What should I expect?

• Because powerful magnets are used, you will be asked several questions about any metal that you have in, or on, your body. If you have certain types of implants (e.g. a pacemaker, cochlear implants, surgical pins) you may not be able to have an MRI scan (in this case you will be offered another type of scan). You will also be asked to remove items of jewellery from your body^4,5
• You will also be asked to leave any metallic objects (e.g. coins, keys) or objects that can be damaged by magnets (e.g. credit cards with magnetic strips) outside the room⁴
• You will need to stay as still as possible during the scan. At times you may be asked to hold your breath⁴
• Some hospitals allow you to have a  family member or a friend in the room with you on the day for support⁴ – ask ahead of time if you would like this option. Remember that they will also be exposed to the magnetism of the scanner, and so will also be asked about metallic implants, jewellery, etc.
• As the magnets in the machine turn on and off, they cause a loud banging noise – this is completely normal. You will be given earplugs or headphones to help quieten this. Your hospital may allow you to play music, so ask ahead of time if you can bring a CD or another music-playing device that you would like to listen to⁴
• MRI machines are often enclosed, and some people can find this a little claustrophobic at times. Your radiographer will be able to help reassure you on any concerns you have around this, and most MRI machines have a button that you can press in the event that you need to talk to the radiographer⁴

What is it, and how does it work?

PET scans use a small amount of mild radioactivity to help visualise the inside of the body. These scans are sometimes combined with either an MRI or a CT scan. The MRI or CT helps to visualise your body, while the PET helps to show parts of the body that are using up a lot of energy (like a cancer growing).⁶

You will need to have a special dye (sometimes called a 'tracer') injected into your body. This is a low-dose sugar solution that is mildly radioactive.⁶ Any areas of your body that are using the radioactive sugar solution quickly (like a cancer) will show up on the scan, as the tracer will build up there.⁶ The dye needs some time to get around your body, so you may be asked to relax somewhere for a while before the scan is performed.⁶

When you have the scan itself, you will lie flat on a motorised bed, which will slowly move you into the scanning machine until the part of your body that is being scanned is in the centre.⁶

You’ll stay in the machine for around 30–90 minutes, depending on what part of your body is being scanned.⁷ You’ll be able to talk with the radiographer while you’re in the machine, and there will be a buzzer you can press in case you feel unwell.⁶

After the scan, the radiographer will be able to tell you if the images the scanner has made are of a good enough quality to be used to assess your cancer, but they will not be able to give you any results.

What should I expect?

• You will need to stay as still as possible while in the scanner⁶
• If you are having a brain scan, you will not be allowed to read while in the scanner.⁷ This is because activities like reading can cause your brain to accumulate a lot of the sugar solution. This creates a signal on the scan in the brain area that could drown out important signals from cancerous growths
• Some hospitals can play music for you while the scan is taking place. Ask ahead if the hospital offers this service⁷
• Because the dye you are given is radioactive, as a precaution you should avoid prolonged close contact with babies, small children, and pregnant women for some time after your scan.⁶ The radiographer will be able to provide you with further details about this
• Because PET scans are combined with MRI and CT scans, you may also need to be aware of some aspects specific to these. You can learn more in the sections above

What is it, and how does it work?

Bone scans are used to find areas of bone in the body that aren’t growing normally. A mild radioactive liquid (called a 'tracer') is injected into the body to make it easier to see where bone is breaking down and repairing (which may happen in cancer).⁸

You may need to wait a while between having the tracer injected into your body and having the scan.⁸ The scan itself will take around 30–60 minutes,⁸ and a radiographer will be on hand in a nearby room. You will be able to communicate with them over an intercom system.

After the scan, the radiographer will be able to tell you if the images the scanner has made are of a good enough quality to be used to assess your cancer, but they will not be able to give you any results.

What should I expect?

• You will need to stay as still as possible while in the scanner⁸
• Because the dye you are given is radioactive, as a precaution you should avoid prolonged close contact with babies, small children, and pregnant women for some time after your scan. The radiographer will be able to provide you with further details about this⁸
• The machine may be enclosed, which some people might find a bit claustrophobic. Your radiographer can help reassure you during these times⁸

What is it, and how does it work?

Ultrasound scanners use high-frequency sound waves to visualise what is inside the body.⁹ There are two types of ultrasound test you may experience:

External ultrasound:⁹ 

• The sonographer (the technician who does the test) presses a special probe against your body. This emits a very-high-frequency sound that humans can’t hear. Inside the body, the sound waves bounce back off your organs and other structures. These are picked up by a microphone in the probe, which turns the sound waves into a picture

Endoscopic (internal) ultrasound:¹⁰ 

• This works in much the same way as an abdominal ultrasound, but instead of a probe being pressed into the abdomen, it is inserted either down the throat or into the bottom. These are used where it may be difficult to get an image of certain parts of the body with a regular external probe. These can sometimes be uncomfortable, so your hospital may offer you an optional sedative