Disclaimer

This is a free educational resource developed by M. Nguyen with substantial help from an AI model (Claude, by Anthropic) and only partly reviewed. It will contain errors. Every figure is labeled as exact formula, in-browser simulation, approximate model, or schematic; none is measured data unless a cited source says so. Not for clinical, regulatory or safety decisions; not a substitute for IEC/FDA/AIUM standards. Personal project; does not represent the views, products or confidential information of any employer or collaborator. Trademarks belong to their owners.

Claims that an audit could not verify are listed on the errata page. The material is provided "as is", without warranty, under the licenses on the about page.