Harrison.ai vs Subtle Medical

Annalise and Subtle Medical meet only when one imaging department has money for a single AI purchase. Annalise flags findings on chest X-ray and head CT for emergency and teleradiology services, and openFDA lists nine 510(k)s under the Annalise and Harrison-AI names, mostly pneumothorax and trauma triage. In a Radiology study of 5,235 patients, its chest X-ray product and six other devices all produced more false positives than radiologist reports, and an NHS Grampian assessment put positive predictive value at 3%.

An imaging center with a congested MRI or PET schedule is Subtle Medical's customer. The vendor puts its protocols at up to 80% faster MRI and up to 75% faster PET, and openFDA lists eleven 510(k)s, the newest for SubtleHD-CT in May 2026. With one AI line item and a scanner queue longer than the reporting queue, Annalise is the purchase that waits. Subtle says its software is deployed on over 1,300 scanners.