Boston-based start-up a2z Radiology AI has received clearance from the U.S. Food and Drug Administration (FDA) for an algorithm that can flag seven urgent findings on abdominal/pelvic CT scans simultaneously.
Called a2z-Unified-Triage, the device covers seven major acute conditions in a single integration: small bowel obstruction, acute cholecystitis, acute pancreatitis, acute diverticulitis, hydronephrosis, free air, and unruptured abdominal aortic aneurysm.
Abdominal/pelvic CT is the highest-volume CT category in the U.S., with over 20 million exams annually, a2z Radiology noted.
“a2z-Unified-Triage works to flag suspected emergencies and move them to the top of the worklist in minutes to ensure faster care for critical patients,” said the company’s co-founder, Pranav Rajpurkar, PhD, in a news release. Rajpurkar is an associate professor of biomedical informatics at Harvard University.
![Axial images from unenhanced calcium score cardiac CT (left) and curved planar reformation images from CT angiography (right) show that higher long-term exposure to air pollution is associated with greater coronary artery calcium and more obstructive coronary artery disease (CAD). Top row: Images in a 68-year-old male patient with higher 10-year mean ambient air pollution exposure (7.9 μg/m3 for particulate matter measuring ≤2.5 μm in diameter [PM2.5] and 17.4 parts per billion [ppb] for NO2) with extensive CAD (coronary artery calcium score [CACS] >1,000 and obstructive CAD [≥70% diameter stenosis]). Bottom row: Images in a 57-year-old female patient with lower 10-year mean ambient air pollution exposure (6.3 μg/m3 for PM2.5 and 4.6 ppb for NO2) with no CAD (CACS = 0 and no obstructive stenosis).](https://img.auntminnie.com/mindful/smg/workspaces/default/uploads/2026/06/hanneman.r6SMLzkezo.png?auto=format%2Ccompress&dpr=2&fit=crop&h=167&q=70&w=250)
