Tuesday, November 30 | 11:50 a.m.-12:00 p.m. | SSG13-09 | Room S403A
In another presentation from the University of Chicago, researchers will show how virtual colonoscopy computer-aided detection (CAD) software can assist in identifying difficult polyps.The researchers sought to determine if their CAD application for virtual colonoscopy (also known as CT colonography or CTC) could improve the performance of expert radiologists in detecting "difficult" polyps, which were either polyps missed by radiologists in a multicenter clinical trial or rated as "difficult" in their retrospective review, said presenter Kenji Suzuki, PhD.
It did. The CAD system, which utilizes massive-training artificial neural networks (MTANN), yielded a sensitivity of 74% for difficult polyps, with a false-positive rate of 3.1 per patient. In comparison, a current CAD system provided a sensitivity of only 43%, with a false-positive rate of 5.6 per patient.
The average sensitivity of four expert radiologists also increased as a result of CAD, improving from 53% to 63%. The difference was statistically significant, Suzuki said.
"It was proved that a computer-aided detection system can improve expert radiologists' sensitivity in the detection of 'difficult' polyps in CT colonography," Suzuki told AuntMinnie.com.
![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)
