
Perimeter Medical Imaging AI is highlighting early results of a new clinical study of its ImgAssist artificial intelligence (AI) software that found the algorithm performs well in analyzing images of breast tissue.
ImgAssist works with Perimeter's optical coherence tomography system (OCT) to analyze tissue specimens excised for additional analysis. The company believes its technology can be a faster, more efficient alternative to traditional histology analysis.
ImgAssist was trained with about 400 volumes of OCT images of excised breast tissue. In the first phase of Perimeter's ATLAS AI project, ImgAssist achieved key sensitivity and specificity benchmarks, including an area under the receiver operating characteristic curve (AUC) of 0.94, which measures how well the algorithm can differentiate between suspicious and nonsuspicious breast tissue areas.
Now, the company will move ahead into the next phase of its project. During the "reader study" stage, it will evaluate how clinicians perform when using ImgAssist offline to interpret images from breast-conserving surgeries.











![A normal mammogram confirmed by three-year radiologic follow-up illustrates reader-marked regions of interest (ROIs) during (A) unaided (round 1) and (B) artificial intelligence (AI)–assisted (round 2) reading. Each colored dot represents an ROI for recall by a human reader. Readers could mark more than one ROI per case, represented by multiple dots of the same color. During AI-assisted reading, the AI system displayed three visible prompts: two with suspicion of malignancy scores of 35% (left mediolateral oblique [L MLO] and craniocaudal [L CC]) and one with a suspicion of malignancy score of 10% (right craniocaudal [R CC]), shown as polygonal overlays. Without AI, six of 10 readers (60%) marked a false-positive ROI. With AI assistance, this fell to two of 10 (20%). R MLO = right mediolateral oblique.](https://img.auntminnie.com/mindful/smg/workspaces/default/uploads/2026/07/2026-07-14-radiology-mammogram-ai-auto-bias.H0bYO8QlWs.jpg?auto=format%2Ccompress&fit=crop&h=112&q=70&w=112)






