Fast, detailed cross-sectional imaging for accurate and timely diagnosis
Computed tomography (CT) uses a rotating X-ray beam and computer processing to build detailed cross-sectional images of the body. Each scan captures many slices, which can be combined into 2D and 3D views of bones, blood vessels, organs and soft tissues.
During the scan you lie on a motorised table that moves slowly through a ring-shaped scanner. For some examinations, a contrast agent given through a vein or by mouth helps the radiology team see blood vessels, organs and abnormal tissue more clearly.
CT is widely used in emergency and inpatient care because it is fast and provides detailed images. It helps doctors assess head injuries, bleeding in the brain, chest and abdominal conditions, complex fractures, and the spread or response of some cancers. The images are reviewed by a radiologist and interpreted alongside your clinical examination.
Your treating doctor decides whether a CT scan is the right test for you and whether other investigations are also needed.
Practical advantages for patients and treating doctors
Modern scanners acquire images in seconds to minutes, which is valuable when time matters.
Thin slices show fine anatomy of bone, lung, organs and blood vessels that plain X-rays may not reveal.
Images can be reformatted into 3D views that help with fracture assessment and surgical planning.
Where clinically indicated, contrast agents highlight blood vessels, tumours and inflamed tissue.
CT is a key first-line test for head injury, stroke-like symptoms and serious abdominal or chest emergencies.
CT uses more radiation than a plain X-ray. Scan settings are tailored to the body part and the clinical question, and the lowest dose that gives a diagnostic image is used.
Common areas where CT scanning supports diagnosis and treatment planning
CT is one part of the diagnostic process. Your doctor interprets findings alongside your history and examination.
Preparation depends on whether a contrast agent is needed. Please follow these general guidelines:
Your details are confirmed and you are asked about allergies, kidney health, pregnancy and previous contrast reactions.
If contrast is needed, a small intravenous line is placed in a vein in your arm. You may feel a brief pinprick.
You lie on the scanning table, which is positioned so the correct body part passes through the scanner.
The table moves through the scanner while you stay still. You may be asked to hold your breath briefly. The technologist watches from a separate room and can speak with you through an intercom.
The images are checked for quality and reviewed by the radiologist, whose report is sent to your treating doctor.
The team follows the ALARA principle, which means keeping radiation exposure as low as reasonably achievable while still producing a diagnostic image.
Rapid, detailed cross-sectional imaging for head, chest, abdomen, pelvis and skeletal conditions, with contrast enhancement and 3D reconstruction when clinically needed.
Skilled professionals operating advanced imaging equipment
This information is for general awareness and does not replace advice from your treating doctor.
Speak with one of our doctors online or get in touch with the hospital team for help with your imaging needs.
