A CT coronary angiogram (CTCA) is an advanced, non-invasive imaging test that uses a specialised CT scanner to produce detailed three-dimensional images of the coronary arteries — the blood vessels that supply oxygen-rich blood to your heart muscle. It is one of the most accurate non-invasive methods for detecting coronary artery disease.
This test is often performed together with a coronary artery calcium score (CACS). The calcium score measures the amount of calcified plaque in your coronary arteries and produces a numerical score that helps quantify your risk of future heart events. A score of zero indicates no detectable calcified plaque, while higher scores indicate increasing plaque burden. Combined with the detailed CT angiogram images, this provides a comprehensive picture of your coronary artery health.
This test is particularly useful for evaluating chest pain, assessing patients at intermediate risk of coronary artery disease, investigating abnormal stress test results, and screening patients with risk factors such as family history, high cholesterol, diabetes or smoking. Unlike a traditional catheter angiogram, it does not require insertion of a tube into the arteries.
Dr Jasmin Grewal holds Grade A accreditation in CT coronary angiography — the highest level available — earned during her 2-year cardiac imaging fellowship at The Austin Hospital. She will assess your suitability for the test, provide the referral to a specialist radiology centre, and interpret your results in the context of your overall cardiac health.