CT Calcium Scoring Information Guide

/ Original Articles / By

Dr Amit Chakraborty, March 2025

Coronary artery disease (CAD) remains a leading cause of heart-related deaths worldwide. However, with advanced medical imaging, such as CT Calcium Scoring, detecting early signs of CAD has become more straightforward and effective. This quick, non-invasive test measures the amount of calcium in your coronary arteries, giving your doctor valuable insights into your heart health and helping you take action before symptoms appear. For a better understanding, let us take you through everything you need to know about CT Calcium Scoring.

Let’s get started!

What Is a CT Calcium Score?

A CT Calcium Score uses a specialised CT scan to measure calcium deposits in your coronary arteries. These deposits, often associated with plaque buildup, can narrow the arteries and reduce blood flow to your heart. The test assigns a score that allows your general practitioner (GP) to assess your risk for developing CAD or complications of CAD. This test is essential for early detection of heart disease risk, empowering patients and doctors to proactively address potential risks (Centers for Disease Control and Prevention, 2021).

Why Your Doctor May Refer You for a CT Calcium Score?

While a CT Calcium Score is effective in identifying the risk of heart diseases, a medical practitioner won’t refer just anyone for this test. Your doctor may recommend a CT Calcium Score to understand your heart health better, especially if:

  • You have risk factors for CAD, such as high cholesterol, high blood pressure, diabetes, or a family history of heart conditions (Australian Institute of Health and Welfare, 2023).
  • You’re over 40 years old and want to assess your heart health proactively (Khoo, 2022).
  • You’re experiencing mild or no symptoms but need a clearer picture of your cardiovascular risk (Chua et al., 2020).

This test offers critical insights for patients with moderate risk factors that traditional assessments may not fully capture. It can identify risks even in those with no symptoms, allowing for targeted prevention or early treatment (Andreini et al., 2012; SCOT-HEART Investigators et al., 2018).

How the Test Works?

A CT Calcium Score is quick, painless, and non-invasive. Here’s the step-by-step process explained –

  • You’ll lie on a table that slides into the CT scanner.
  • Using an ECG monitor, the scanner uses low-dose X-rays to capture detailed images of your heart and arteries timed with your heartbeat.
  • You may be asked to hold your breath briefly to improve the image quality.

The entire process takes about 10–15 minutes, and you can return to your usual activities immediately after (Tropis, 2023).

How to Prepare for the Test?

Preparation for CT Calcium Score is simple but make sure to follow these measures to ensure accurate testing.

  • Avoid caffeine or nicotine for at least four hours before the scan, as these can affect your heart rate.
  • Wear comfortable clothing without metal buttons or zippers. Depending on your clothes, you may need to be changed for the test.
  • Follow any additional instructions provided by your doctor.

No fasting or special preparation is needed unless specifically advised.

Benefits of Early Detection with CT Calcium Score

Heart disease often develops silently, with no noticeable symptoms until it’s severe. A CT Calcium Score helps detect potential problems early, offering:

  • Personalised prevention plans that may include lifestyle changes or medications.
  • Improved outcomes, as doctors can intervene before symptoms escalate.
  • Reassurance for patients with low scores, reducing unnecessary stress.

This test is also valuable when combined with other advanced imaging, like CT Coronary Angiography (CTCA), which provides detailed images of coronary artery anatomy to identify both obstructive and non-obstructive diseases (Maffei et al., 2014; Maddox et al., 2014).

Take Control of Your Heart Health

CT Calcium Scoring is a powerful tool for assessing your heart health and preventing serious complications. If your doctor has recommended this test, it’s an important step toward understanding and managing your cardiovascular risk. At CareScan Medical Imaging, we use the latest technology to deliver accurate results and exceptional care. Speak with your doctor or contact us to learn how CT Calcium Scoring can help you.

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