A landmark study shows that measuring how much an aneurysm sac shrinks in the first year after surgery can reliably forecast what that sac's diameter will do over the long haul — unlocking smarter, more personalised patient monitoring. The Problem with Watching Arteries Heal Abdominal aortic aneurysms — dangerous bulges in the body's main artery — kill tens of thousands of people each year when they rupture without warning. Endovascular aneurysm repair, or EVAR , is a minimally invasive surgery in which doctors thread a stent-graft through the groin to seal off the bulge from the inside, like patching a weak hose from within. It's revolutionised vascular surgery, offering patients a far quicker recovery than open surgery. But EVAR is not a cure. The sealed sac still exists inside the body, and over months and years it can change size — ideally shrinking as blood pressure is removed from it, but sometimes stubbornly staying the same or even growing. A sac that keeps expanding after surgery can signal a dangerous leak (called an endoleak ) or graft failure, either of which may require a second intervention. So, after every EVAR procedure, patients face a lifetime of periodic CT scans to check one simple thing: is the sac getting bigger or smaller? "For years, the number clinicians relied on was a single diameter measurement — essentially, how wide is the bulge? But width alone turns out to be a surprisingly blunt instrument." - Background context from the field of post-EVAR surveillance The challenge is that current guidelines require follow-up CT scans roughly every year for life, which is expensive, exposes patients to radiation, and still may miss subtle warning signs until they have become obvious on a simple diameter measurement. Researchers and clinicians have long wondered: is there a better, earlier signal we could use?
Part 2 of 5 in Circle's Coronary Plaque series. Also read: Part 1 — How Advanced Plaque Analysis Changes the Clinical Calculus When clinical cardiology adopts a new capability, IT inherits the infrastructure. And right now, coronary plaque analysis is moving from research tool to clinical standard fast enough that many IT and PACS teams are still catching up. The demand is real. The 2021 ACC/AHA Chest Pain Guidelines made CCTA a Class I recommendation for stable chest pain evaluation. More recent trial data — including 10-year outcomes from SCOT-HEART and the ongoing SCOT-HEART 2 trial — is driving cardiology programs to go further, adding quantitative plaque characterization alongside standard stenosis reporting. That means new software, new data flows, new integrations — and new complexity landing in your environment. How that complexity lands depends almost entirely on the path the department chooses. There are essentially two: a unified platform that performs plaque analysis natively, inside your existing environment — or a send-away service that moves CCTA data out of your network to a vendor cloud, runs the analysis there, and returns a result. Those two paths lead to very different IT outcomes.
Part 1 of 5 in Circle's Coronary Plaque series. Consider a familiar scenario. A 52-year-old presents with atypical chest discomfort. The stress test is borderline. The referring physician is uncertain — is this true coronary disease, or something else? Standard imaging has been done. The anatomy looks, on the surface, mostly normal. And yet something about this patient doesn't sit right. This is the case where clinicians have historically had to make consequential decisions with incomplete information. Escalate to invasive angiography and risk an unnecessary procedure. De-escalate and risk missing a vulnerable plaque that hasn't yet caused significant stenosis — but will. Coronary artery disease doesn't announce itself neatly. A substantial share of acute coronary events occur in patients with non-obstructive coronary disease — lesions that would not have triggered revascularization on a standard angiogram. The stenosis grade has always been an imperfect surrogate for risk. What matters is the plaque itself: its composition, its burden, and its vulnerability. Advanced CCTA plaque analysis changes that calculus.
The Effort, Risks, and Why It’s Worth It Quantifying the Effort of a Single Platform Learning a new (or deeper) way of working Even for existing cvi42 users, full standardization across cardiac imaging means: Adapting to new modules or modalities. Rethinking how you structure reading lists when more work is visible in one place. Helping develop shared templates and protocols. It’s completely normal to see a temporary dip in productivity when something new is introduced. Our brains are wired for loss aversion: we tend to focus more on what we might lose than on what we could gain. Recognizing that bias helps put the slowdown in perspective: it’s not a setback, it’s just part of the process that leads to long‑term progress.
