Many people are confused by the difference between a Coronary CT Angiogram (“Coronary CTA”) and a CT Calcium score (“Calcium Score”) test. This is pertinent question to clarify, as they both serve to tell us about our heart health, but one costs significantly more than the other. This article clarifies the difference between the two and answers the common question “Coronary CTA Vs Calcium Score – what is the difference?”
What Is CT Calcium Score Scan?
A CT calcium score scan is used for assessment of risk assessment for heart attacks.
It is a non-invasive CT scan that does not require the use of contrast dye, nor does it need any special preparation. The calcium score test shows the amount of calcium deposits in the coronary arteries in the heart, and provides an assessment of the risk for heart attacks. CT Calcium Score scans do not provide information on non-calcium blockages and does not tell doctors if the patient is experiencing any blockage of the blood vessels.
Cost Of CT Calcium Score Scan In Singapore
The cost of a stand-alone CT Calcium Score scan in Singapore at a private clinic is around S$300-S400. Doctor’s consultation fee may apply in addition, as under local regulations, a doctor’s referral is needed for CT scans.
What Is A Coronary CTA?
A Coronary CTA is used for diagnostic purposes, and not for screening (i.e. when the patient is not presenting any symptoms). Using the same CT scanner as for Calcium Score scans, it requires higher doses of radiation and the use of contrast dye to evaluate the flow of blood and identify any narrowing or blockages in the coronary arteries. A Calcium Score test may be done as part of a Coronary CTA.
Doctor order Coronary CTA for patients who have symptoms of coronary artery disease (e.g. chest pain, breathlessness, or abnormal stress ECG results.
Cost of Coronary CTA In Singapore
The cost of a Coronary CTA in Singapore, inclusive of CT Calcium Score test, costs from about $1,000 – $1,200. Doctor’s consultation fee may apply in addition, as under local regulations, a doctor’s referral is needed for CT scans.
Coronary CTA Vs Calcium Score – Key Differences You Should Know
Coronary CTA Vs Calcium Score – the key differences between the 2 medical imaging scans are summarised in the table below:
| CT Calcium Score | Coronary CTA | |
| Who is It Suitable For? | People with no symptoms of coronary heart disease, and have low to intermediate risk of coronary heart disease. Not intended for people with symptoms. | People with symptoms of coronary artery disease |
| What Does It Show? | Shows calcium deposits only | Shows blockages |
| Purpose Of Scan | Assessment of risk of heart disease | Diagnose the cause of symptoms shown |
| Use Of Contrast Dye | No contrast needed | Contrast is used |
| Radiation Exposure | Less radiation exposure | More radiation exposure |
Considerations For Choosing Coronary CTA Vs Calcium Score
People showing no symptoms of heart disease may face a dilemma in choosing whether to undergo a Coronary CTA or a CT Calcium Score test. In making a choice, the following considerations may serve as a guide.
Amount Of Radiation
While a Coronary CTA is considered a safe procedure, it does expose the patient to a higher radiation dose compared to a CT Calcium Score test. Nonetheless, minimising exposure to radiation may be an important consideration for younger patients or those need to undergo repeated imaging.
Use Of Contrast Dye
A Coronary CTA requires the injection of contrast dye. This might not be suitable for patients with kidney problems or are allergic to contrast agents.
Cost Of Scan
A Coronary CTA is more expensive than a Calcium Score scan, which may be a consideration for some people.
Coronary CTA Vs Calcium Score Use Indication
The Calcium Score scan is used for risk assessment in people with no symptoms and have lower risk of coronary artery disease. It can provide information to guide preventive measures and lifestyle modifications.
Get Screened For Coronary Artery Health
If you are looking for a heathcare provider to get either a CT Calcium Score test or a Coronary CTA, we can set up an appointment with our healthcare partners. Contact us below.
Learn More About Heart Disease And Medical Imaging
To learn more about heart health or medical imaging, head over to our Heart Disease page and our Medical Imaging page.
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This article is informative only and is not intended to be a substitute for professional medical advice, diagnosis, or treatment, and should never be relied upon for specific medical advice.