CT for Silica Health Surveillance


What is a low dose high resolution CT scan for silica health surveillance?

CT stands for computed tomography. A CT scanner has detectors which move around the body in a circular motion.

This CT scan of the lungs uses low levels of radiation to help diagnose and monitor many different conditions.

Using the CT scanner, and a powerful computer, we can build 3D images showing the lungs, bones and soft tissue, and see some parts of the body which are difficult to view by other imaging methods (such as x-ray).

This CT examination is simple, fast and painless.

Why is low dose high resolution CT important for silica surveillance?

Low dose high resolution CT allows doctors to safely and confidently diagnose and monitor silica related changes to the lungs for workers who are at risk.


There is no preparation required for a silica surveillance CT scan. You will be asked by our reception staff to arrive 15 minutes before your appointment.

How long will the procedure take?

An appointment for a low dose chest CT for silica surveillance will usually take approximately 10 minutes.


You will be asked to lie on a narrow bed, which can move forwards and backwards through the scanner. The CT scanner looks like a wide doughnut (not a tunnel) which contains the x-ray tube and sensitive detectors.

You will hear a spinning sound while the scanner is taking pictures and the images will be taken while the bed moves through the scanner.

You will hear a recording that will give you instructions about when to hold your breath for a few seconds during the scan. You will be monitored at all times by our trained staff during your scan.

What happens after my CT scan?

You can return to your usual activities after your CT scan.

Your low dose chest CT images will be prepared, analysed and then reported by a specialist doctor (radiologist) who is a registered expert in occupational dust lung diseases.

The CT report and images will be provided to your doctor.

Are there any risks?

At Perth Radiological Clinic:
• the CT scanners used for silica surveillance are state-of-the art with dose-lowering technology to ensure the lowest possible radiation dose is used.
• we have special protocols to ensure that radiation exposure is kept to the minimum required to produce diagnostic quality images.
• the benefits of detecting disease far outweigh any potential risks from receiving such a small radiation dose.

Female patients: Please inform the technologist if you think you might be pregnant before your scan.

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