San Radiology & Nuclear Medicine

Computed Tomography (CT)

San Radiology & Nuclear Medicine provides latest generation CT technology in the Siemens FORCE (384-slice, Dual Source). Offering ULTRA-LOW dose imaging, with up to 50% lower radiation dose compared to previous generation CT machines, the Siemens FORCE is considered to be the lowest radiation dose capable CT system in the Australian market today. It also offers “no-breath-hold imaging” due to its extreme speed, as well as offering increased diagnostic sensitivity through the application of Dual Energy CT (DECT) as required. The superior image quality achieved by using the Siemens FORCE technology makes it clear market leader for many applications including Cardiac CT, enabling high resolution imaging of the heart with speed and precision.

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In addition to the Siemens FORCE, San Radiology also has two other CT machines:

128-slice Siemens AS+ (also an Ultra-Low dose system with DECT)
64-slice GE Optima (dedicated to interventional procedures with real-time scanning capability)

CT scanning services are utilised across a range of medical conditions and treatments, from providing information for pre-operation planning through to delivering real-time guidance for procedures. The San’s CT scanning services play a vital role in ensuring accurate information is available for the individual’s medical team to optimise their treatment and recovery. At our easily accessible location on Sydney's north shore, we ensure patients are able to have their scans completed quickly and efficiently in a comfortable environment, with results available to their medical specialists in a timely manner.

Having a CT SCAN

Most patients find a CT scan to be a relatively simple examination. You will be asked to lie on a table that moves in and out of the “doughnut-shaped” opening in the CT scanner called the gantry. At San Radiology two of our machines have the largest available gantry on the market, which significantly decreases any likelihood of claustrophobia. If you are having a scan of your abdomen or chest (including heart) then you may be asked to hold your breath for the short duration of the scan. It is very important that you remain very still during your scan to prevent blurring of the images and to maximise image quality.

Some typical CT examinations include, but are not limited to:

Brain / Skull
Facial Bones or Sinuses
Inner Ear Structures
Soft Tissues of the Neck
Spine (Cervical, Thoracic and Lumbar)
Ultra-low Dose CT Skeletal Survey
Chest
Abdomen/Pelvis (including scans of your colon known as CT Colonography)
CT Coronary Angiography (heart)
CT Angiography (assessment of blood vessels)
Pre-Op Angiography Planning for Surgery (including TAVI, Watchman Device, Mitral Valve, DIEP Flap and Prostate Embolisation)
Bones / Joints (extremities)
Pre-Op Planning for Extremity Prosthesis (Shoulder, Hips & Knees)
Radiotherapy Planning (to assist guided planning for cancer treatments)
Biopsies and Drainages (often using real time guidance)
Spine or Joint Injections

A tissue marker is a very small object that is inserted into the breast either at the time of a biopsy, or to mark a previously diagnosed abnormality. There are a number of different types of markers available and the radiologist uses the marker clip most suitable for your particular requirements. There are different materials used in the various markers that are available and the markers come in a variety of shapes. Different shapes are useful if there are multiple areas to be marked in the same breast.

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Frequently Asked Questions

Is any preparation required for a CT scan?

Most patients who have a CT scan of their head, chest (including heart), abdomen and/or pelvis are asked to stop eating two (2) hours prior to their examination. However, you may continue to drink clear fluids during that time.

For some CT scans of the abdomen and/or pelvis you may also be asked to drink 2 cups of oral contrast (fluid) before your examination. This oral contrast will be a mixture of low-sugar cordial and an iodine-containing liquid or occasionally barium. Oral contrast is used to define your stomach and bowel and distinguish these structures from other neighbouring organs. If you are required to have oral contrast, you will be asked to arrive 20 minutes before your appointment time. When you arrive you will be provided with drinking instructions to prepare for your scan.

If you are known to be diabetic or allergic to iodine then please remember to inform us at the time of making your appointment as special preparation instructions may apply.

Clothing items such as zippers, buttons, earrings and hairpins can interfere with the scan quality. For this reason you may be asked to change into a hospital gown prior to your scan.

Do I need to have an injection?

For some CT examinations an intravenous (IV) (small injection usually into the vein in your arm) contrast injection is required to highlight the blood vessels.

IV contrast is a clear fluid that contains iodine. If you are known to be allergic to IV contrast or Iodine please let us know at the time of making your appointment and also when you arrive on the day of your scan. On the day of your scan you will also be asked to provide a brief medical history and complete a questionnaire, which will also ask if you have any known allergies. This process enables us to assess if there is any risk associated with administering you contrast. The decision to administer contrast is made at the time of your scan and depends on your medical history and the clinical question being asked by your referrer.

You should always continue to take regular medications as prescribed by your doctor.

How long does a CT examination take?

The CT scanners at San Radiology scan very quickly. Depending on the type of scan you are having, the time will vary from just a few minutes to around 30 minutes on the scanner. On average patients spend less than 10 minutes on the scanner.

If you are required to drink oral contrast for your scan then you can expect to be in our department for approximately 30 minutes (including the time it takes to drink the oral contrast). This length of time is required to allow the oral contrast to pass through and coat the bowel.

Our dedicated CT team will make every effort to ensure that your scan is completed as quickly and as comfortably as possible.

How long will my results take?

Most CT scan results are available within 24 hours of your scan. Referring doctors will be able to see images and reports immediately once available.

Patients can access their imaging once completed through the MySRNM app available on iOS and Android or by visiting www.sah.org.au/patient-resources/ for more information. Patients will be able to see their imaging as soon as the examination is finished and reports 7 days after being signed off by the Radiologist.

If you are seeing your doctor within 24 hours of your scan then please inform our staff so that we can fast-track your report.