This scan takes pictures of the heart's arteries and looks for hardened, calcium-filled plaque inside their walls. The more calcium, the more plaque has built up over time. Here's where yours showed up, and what the numbers mean.
A total score of 52 falls in the "mild" range. It means a small amount of hardened plaque was found — not zero, but far from severe. Nearly all of it sits in one spot, and the rest of the arteries look clear.
60th percentile for your age & sex — slightly above averagePercentile is just a comparison: a 60th percentile means your score is higher than about 60 out of 100 people of the same age and sex, and lower than the other 40. It's a ranking, not a grade.
The heart has its own set of arteries on the outside that feed the heart muscle itself — these are the coronary arteries. The scan checks each one. Below is a front-facing view of the heart. The brighter and redder a vessel glows, the more calcium it holds.
Your report lists scores for five named arteries plus a catch-all for "additional vessels." That isn't five random points — it's the complete set of coronary arteries, the heart's own delivery network. The scan measures these because they are the ones that matter for heart attacks.
The heart pumps blood to the whole body, but the muscle itself is fed by these arteries sitting on its surface. If one narrows or clogs, part of the muscle is starved — that's a heart attack.
The dangerous, calcium-hardened plaque that this scan hunts for forms inside these specific arteries. Calcium elsewhere — like in a heart valve — isn't counted in this score.
Between them, the left main, front, side, right, and back arteries supply every region of the heart. Listing each separately shows exactly which area carries plaque and which is clear.
Some people have extra branches or anatomy that varies. That last line makes sure any calcium outside the five main arteries still gets counted — for you it came back at zero.
The total of 52 is the sum of each artery's score. Here's what each one came back with.
The short, important trunk where the left side's blood supply begins, before it splits into the front and side arteries. Most of your calcium is here.
Most of the calciumRuns straight down the front of the heart toward the tip. It feeds a large area of muscle. A small amount of calcium showed up here.
A little calciumCurves around the left side of the heart toward the back. No calcium found — this artery is clear.
ClearRuns down the right side of the heart. No calcium found — this artery is clear.
ClearSits on the back of the heart, near the bottom. No calcium found — this artery is clear.
ClearAny smaller branches the scan measured. Nothing extra was found here.
ClearThe score isn't a guess or a single reading. It's calculated by a method (called the Agatston method) that turns the brightness and size of each calcium spot into points, then adds everything up. Here's how it works.
The CT scanner takes a stack of cross-section pictures through the heart, timed to your heartbeat so the images stay sharp. No dye or injection is needed.
Calcium shows up brighter than blood or muscle on a CT. The computer flags any spot inside an artery above a set brightness threshold and marks it as calcified plaque.
Every calcium spot gets points based on how large it is, multiplied by a weighting for how bright (dense) it is. Brighter, denser calcium counts for more.
All the points from all the spots, across all the arteries, are summed. That grand total is your calcium score.
The brightness weighting in step 3 works on a 1-to-4 scale — the brighter the calcium, the higher the multiplier:
When the points from your arteries are added together, they reach 52:
Because the math is just addition, you can see at a glance that the Left Main alone (38) accounts for about three-quarters of the whole score, with the front artery (14) making up the rest. Everything else contributed nothing.
Calcium scores group into ranges. Higher numbers mean more hardened plaque has built up, which is linked to a higher chance of heart problems down the road. Your 52 lands in the mild band.
Here's what each range generally means for risk. These are broad patterns from large studies, not a personal verdict — your own risk also depends on age, blood pressure, cholesterol, smoking, diabetes, and family history.
Very low risk. No hardened plaque was found. Heart events over the next several years are uncommon in this group.
Low risk. A tiny amount of calcified plaque exists, but the burden is very small.
Modestly increased risk. There's some plaque, so heart-protective habits and managing things like cholesterol and blood pressure become more worthwhile. Your 52 sits in this band.
Notably increased risk. A meaningful amount of plaque is present, and doctors often consider more active prevention or further testing.
High risk. A large amount of calcified plaque, usually prompting aggressive prevention and sometimes additional heart testing.
A key point: the calcium score measures how much hardened plaque is present, not how blocked an artery is. It can't tell you the percentage an artery is narrowed. Instead, it's an early-warning marker — it shows that some plaque exists and helps estimate future risk.
The report adds one standard caution: it suggests looking more closely if there were signs of disease in several arteries at once, or disease centered mainly in the left main. Since your left main carries most of the calcium, that's a sensible point to raise and discuss at your cardiology visit.
Beyond the scores, the report carries a few short notes about why the scan was ordered and what to watch for. Here's what each one means in plain terms.
"CAD" is coronary artery disease — plaque building up in the heart's arteries. This was a screening scan, meaning it was done to look ahead before any clear symptoms, not to react to an emergency. "Intermediate risk" means earlier estimates put the risk somewhere in the middle — not low, not high. A calcium scan is especially useful in exactly that middle zone, because it can nudge the picture clearer in either direction.
This flags that a treadmill (exercise stress) test may be on the table — walking on a treadmill while the heart is monitored, to see how it behaves under effort. The calcium score helps the cardiologist decide whether that step is worth doing.
This is a standard safety note: take a closer look if plaque shows up in several arteries at once, or if it's concentrated mainly in the left main — the trunk artery, because it supplies such a large share of the heart. In your case the left main holds most of the calcium (38 of 52), so this is the most worthwhile point to raise with your cardiologist. It's a prompt to discuss, not an alarm.
The scan used a low-radiation setting matched to the exam, and needed no contrast dye or injection. It's a quick, low-burden test — one reason calcium scoring is popular for screening.
A calcium scan captures part of the chest too, so the radiologist looks at what else is visible.
The visible parts of the lungs and the area between them (the mediastinum) looked unremarkable — nothing concerning was noted.
This page restates the scan's findings in everyday language to make them easier to follow. Your cardiologist will weigh this score alongside blood pressure, cholesterol, family history, and other factors to decide what, if anything, comes next.