Feb. 26, 2026
When Software Irradiated Cancer Patients | Therac-25 Incidents

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When cancer patients returned for follow up treatments all over North America, they had no idea they were at risk for radiation overdoses. They had no clue that multiple organizations failed to stop them from being irradiated.
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Sources
- https://en.wikipedia.org/wiki/Therac-25
- https://onlineethics.org/cases/therac-25/history-introduction-and-shut-down-therac-25
- https://www.slideserve.com/illias/therac-25-nancy-leveson-university-of-washington-clark-s-turner-uc-irvine
- https://www.sutori.com/en/story/therac-25-accident-summary--zTRpW48523CDeS71yndLhoMb
- https://www.canada.ca/en/health-canada/corporate/about-health-canada/branches-agencies/healthy-environments-consumer-safety-branch/environmental-radiation-health-sciences-directorate/radiation-protection-bureau.html
- https://pvs-studio.com/en/blog/posts/0438/
- https://users.csc.calpoly.edu/~jdalbey/SWE/Papers/THERAC25.html
- https://soundofdevelopment.substack.com/p/the-therac-25-disaster-when-software
- https://cse.msu.edu/~cse470/Public/Handouts/Therac/Therac_4.html
- An Engineering Disaster- Therac 25
- An Investigation of the Therac-25 Accidents Nancy G. Leveson, University of Washington Clark S. Turner, University of California, Irvine
- Michigan State University
- University of Texas