What is a calcium score CT for the heart called?

What is a Calcium Score CT for the Heart Called?

A calcium score CT for the heart is formally called "Coronary Artery Calcium Scoring" (CAC scoring), "CT Calcium Scoring," or "Coronary Calcium Scoring." 1, 2 The test may also be referred to as "Coronary Artery Calcium Scan" or simply "Calcium Score CT." 3

Technical Terminology

• The procedure uses electrocardiogram-gated multidetector computed tomography (CT) to detect and quantify calcium deposits in the coronary arteries. 2

• The test is typically performed using a prospectively ECG-triggered scanning mode with 2.5-3.0 mm thick axial images obtained through the heart. 1, 2

• The calcium is quantified using the Agatston score, which is the most widely used scoring system and defines calcific lesions as having CT density >130 Hounsfield units and area >1 mm². 4, 5

Common Reporting Format

• In formal radiology reports, the exam is typically documented as "Coronary CT Angiography with Calcium Score" when performed alongside contrast imaging, or as a standalone "CT Calcium Score" examination. 1

• The quantity of calcium is scored as the area affected on the scan, multiplied by a weighting factor depending on the Hounsfield unit density of the calcium deposits. 1

Clinical Context

• This non-invasive imaging technique quantifies coronary artery calcification to assess atherosclerotic burden and predict cardiovascular risk. 2

• The radiation dose is relatively low at approximately 0.9-1.5 mSv, comparable to 1-2 mammograms. 1, 2