Low-dose CT for lung cancer screening
Low-dose computed tomography (LDCT) is used for the early detection of lung cancer – when treatment is most effective – and has been proven to significantly improve survival rates. Our half-day LDCT lung cancer screening service at The London Clinic Lung Centre combines advanced technology and world-class expertise with a seamless, patient-centred approach. Our multidisciplinary team of radiologists and lung specialists ensures accurate diagnostics and the highest standard of care.
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What is it for?
Detecting early stages of lung cancer
What is low-dose CT screening?
Low-dose CT (LDCT) is a highly sensitive, non-invasive imaging technique designed to detect lung cancer at its earliest stages, when treatment is most effective.
A CT scan uses X-rays and a computer to create detailed images of the inside of your body. It is frequently used for the detection, diagnosis and treatment of cancer.
CT scans typically expose the patient to small amounts of radiation, which can increase the risk of future cancers. However, LDCT uses around one-fifth of the radiation of a standard CT scan, making it a much safer option for routine lung cancer screening, while still delivering detailed images of the lungs. It is recommended for individuals at high risk, such as current or former smokers aged 50 and older.
During a low-dose CT scan for lung cancer, the scanner creates a detailed image of your lungs. This picture can enable your specialist to detect and assess lung nodules or other abnormalities that may be cancerous, often before any symptoms appear.
As a result, regular LDCT screening increases your chances of detecting lung cancer in its early stages. Early detection enables timely treatment, improving the chances of long-term survival.
Preparing for your LDCT screening
There is no special preparation required for an LDCT screening. You should wear comfortable, loose-fitting clothing without metal components, such as zips and buttons. You will also be advised to remove any metal jewellery prior to the scan.
In addition, your care team will review your medical history and discuss any conditions you may have, as well as whether you are or could be pregnant.
During your LDCT screening
When it is time for your scan, you will lie on a table that slides into the machine. A CT scanner is round with a hole in the middle, resembling a doughnut. You may be secured with straps or given pillows to help you stay comfortable and still during the procedure.
Once you’re inside the machine, it will rotate around you. It is important to remain as still as possible throughout the scan. You will be able to communicate with the technologist, who will give you instructions as needed. For example, they may ask you to hold your breath for five to ten seconds at a time.
Recovery and aftercare
Once the scan is complete, a radiologist will review the images for any abnormalities. They will then discuss the results with you on the same day as part of our half-day screening service. If further evaluation is needed, you will receive a personalised care plan outlining the next steps.
Are there any risks associated with LDCT screening?
While LDCT screening only involves small amounts of radiation, it's important to note that the lungs are particularly sensitive to radiation. Frequent scans could potentially cause lung damage.
LDCT screening also carries a small risk of both false negatives and false positives.
However, it is generally considered that the significant benefits of LDCT screening outweigh the risks. This is because LDCT screening can lower the risk of mortality from lung cancer by 20%.
Your consultant can talk to you about these risks in detail before any screening is booked.
Low-dose CT screening FAQs
The whole process is painless and typically takes less than 10 minutes.
If you are or have been a regular smoker and are over the age of 54, you are considered high risk for lung cancer. In this case, we recommend annual LDCT screening. This should continue every two years until you are 74 years of age.