Aortic calcification seen by chance on an X-ray or CT

What the report means

The report means calcium deposits were seen in the wall of the aorta, the main artery from the heart through the chest and belly. Reviews describe it as part of hardening of the arteries (atherosclerosis), which can affect the whole artery tree. (Salah Jumah Alam 2026) Calcium in the belly part of the aorta can be seen on CT, on a side view X-ray of the lower spine, or on side view images from a bone density (DXA) machine. (Leow 2021)

Words a report may use (simplified)
Report wording	What it describes
Aortic arch calcification	Calcium in the curved top of the aorta, often seen on a chest X-ray, sometimes graded 0 to 3 (Hashimoto 2009)
Thoracic aortic calcification	Calcium anywhere in the chest part of the aorta (root, ascending, arch or descending) (Salah Jumah Alam 2026)
Abdominal aortic calcification, aortoiliac atherosclerosis	Calcium in the belly part of the aorta, seen on CT, a spine X-ray or DXA (Leow 2021)
Mild, moderate, severe	A rough grade of how much calcium was seen; studies use different scales (Leow 2021)(Salah Jumah Alam 2026)

How common it is with age

Belly aorta. Found in about 1 in 3 people aged 45 to 54 and up to 9 in 10 people over 75 in population studies. (Leow 2021)
Chest aorta on lung screening CT. In the US National Lung Screening Trial, it was seen more often with age in both sexes, in 87.2% of men aged 55 to 59 and 99.5% of men aged 70 to 74. (ERS/ESR 2023)
Chest X-ray. In a 2009 study of 239 outpatients (average age 61.9), arch calcium was grade 0 in 46%, grade 1 in 22%, grade 2 in 29% and grade 3 in 4%. The study found the X-ray grade reflected calcium in the whole aorta. (Hashimoto 2009)

What studies say about heart risk

Belly aorta, review of 52 studies, 36,092 people. People with any or more calcium had about 1.8 times the risk of heart and blood vessel events and about 2 times the risk of death from any cause compared with the lowest calcium group. The link was stronger in people with chronic kidney disease. (Leow 2021)
Chest aorta, review of 43 studies, 176,738 people. Calcium was linked with higher risk of death from any cause (hazard ratio 1.61), heart death (2.13) and stroke (1.45). The link was strongest on CT and also seen on chest X-ray. (Salah Jumah Alam 2026)
Limits. The reviews say studies measured calcium in different ways and that reporting should be standardised. Results from the large US MESA study on chest aorta calcium have been conflicting. (Leow 2021)(Salah Jumah Alam 2026)

These are results from groups of people, not a forecast for one person.

What comes next

No set follow-up. A 2026 review notes that European (ESC) and American (ACC/AHA) heart prevention guidelines do not include aortic calcification in their steps. (Salah Jumah Alam 2026) A 2023 European statement on lung screening scans says guidelines do not recommend clinical assessment of chest aorta calcium. (ERS/ESR 2023)
A heart risk check. The 2021 review says calcium in the belly aorta found by chance, in someone with no known heart disease or risk information, should prompt checks such as a cholesterol test, an ECG or a calcium score scan. (Leow 2021)
Other findings on the same scan. If the report also mentions heart artery calcium, valve calcium or a widened aorta, see heart artery calcium found by chance, aortic valve calcium and a wide chest aorta.

Your doctor decides which checks fit your scan, your health and your history.

Who it applies to

Adults told that an X-ray, CT or bone density scan done for another reason shows calcium in the aorta. If you have chest pain or other heart attack symptoms, the advice below applies whatever the scan showed.

MedlinePlus, heart attack symptoms: (MedlinePlus)

If you are having symptoms of a heart attack, you should call 911, even if you are not sure it is a heart attack.

Routine age-based screening

An X-ray or CT done for another reason is not a heart screening test. Your routine screening stays on its usual schedule unless your doctor says otherwise.

Blood pressure. USPSTF recommends blood pressure screening for all adults 18 and older. (USPSTF blood pressure) See blood pressure screening.
Blood pressure and cholesterol in the UK. The NHS Health Check, with a blood pressure test and a cholesterol test, is offered every 5 years to people aged 40 to 74 without certain existing conditions. (NHS Health Check) See cholesterol test by age.
AAA (a swelling of the belly aorta). USPSTF recommends a one-time ultrasound for men aged 65 to 75 who have ever smoked. (USPSTF AAA) The NHS invites all men in England the year they turn 65. (NHS AAA) See AAA screening and AAA screening results.

Where they differ:

Reporting. The 2023 European lung screening statement says not to report chest aorta calcium on those scans. (ERS/ESR 2023) The 2021 review says belly aorta calcium found by chance should prompt a heart risk check and that sharing it may help doctors manage heart risk. (Leow 2021)
Kidney disease. The 2021 review notes that KDIGO kidney guidance treats people with chronic kidney disease (stage G3a or worse) who have aortic calcium as at the highest heart risk. (Leow 2021)
AAA screening. USPSTF screens men aged 65 to 75 who have ever smoked and offers it selectively to men who never smoked. (USPSTF AAA) The NHS invites all men at 65. (NHS AAA)

Your doctor decides what your result means for you.

Questions people ask

What does aortic calcification mean on a report?

It means calcium deposits were seen in the wall of the aorta, the main artery that runs from the heart through the chest and belly. Reviews describe it as a sign of hardening of the arteries (atherosclerosis). It can show up on a chest X-ray, a CT, a side view X-ray of the spine or a bone density scan. (Leow 2021) (Salah Jumah Alam 2026)

How common is it?

Very common, and more so with age. A 2021 review says calcium in the belly part of the aorta is found in about 1 in 3 people aged 45 to 54 and up to 9 in 10 people over 75. In a large US lung screening trial, calcium in the chest aorta was seen in 87.2% of men aged 55 to 59 and 99.5% of men aged 70 to 74. (Leow 2021) (ERS/ESR 2023)

Does it mean my heart risk is higher?

In groups, yes. Two reviews of many studies found that people with aortic calcification had more heart events and deaths over the following years than people without it, and the link was stronger with more calcium. These are results from groups of people, not a forecast for one person. Your doctor decides. (Leow 2021) (Salah Jumah Alam 2026)

Is aortic calcification the same as an aneurysm?

No. Calcium in the wall and a widened aorta are separate findings. A European statement on lung screening scans says a widened chest aorta should be reported, but calcium in the chest aorta on its own should not. See the wide chest aorta and AAA pages. (ERS/ESR 2023)

Does this change my routine screening?

Your routine blood pressure, cholesterol and AAA screening stays on its usual schedule unless your doctor says otherwise. USPSTF advises blood pressure screening for all adults, the NHS Health Check covers blood pressure and cholesterol from 40 to 74, and AAA screening is offered to men at 65 (NHS) or 65 to 75 who have ever smoked (USPSTF). (USPSTF blood pressure) (NHS Health Check) (NHS AAA) (USPSTF AAA)